It's hard to pick stocks in cloud computing, because so many of them have become absurdly overvalued. So what I do is look at a handful of them, learn about the companies, and try to figure out which ones have true staying power. Then you look for opportunities to buy them on pullbacks.

Riverbed is a company that I have been following for several years. I have published a profile of Riverbed here on my new site, Investor Uprising, in which I try to explain how Riverbed plans to expand. A true "best of breed" player in WAN optimization, Riverbed is now looking to use its leverage in that market to branch out and grow on more fronts. I had a chance to meet with several Riverbed executives at Interop in Las Vegas, and following those meetings I think the company is on the verge of taking it to the next nevel. CEO Jerry Kennelly very clearly described some growth opportunities for the company that will take it from a point-product company to a multifaceted networking power.

Here's the important thing about Riverbed: Its technology takes advantages of long-term trends in networking in computing: Data-center consoldiation, the migration of apps from the enterprise to the cloud, and outsourced networking optimization. If you are asking what this all means because it's too many buzzwords -- it's that large and small companies both are looking to outsource more of their technology and networking needs to service providers who operate in the "cloud" -- providing any application or computing online, at any time.

The reason this is important for Riverbed is because it flies in the face of what has built the existing networking juggernaut: Cisco Systems. Cisco is built on the emergence of Ethernet networks and IP routing. It comes from an era in which companies hired armies of IT people to configure and deploy Ethernet switches and routers. All of that is moving to the cloud and massive data centers run by service providers. The interesting thing here is that Cisco has displayed weakness in selling data-center products: Its software is aging and lacks the scale to handle the shift.

This is a profound shift and one to carefully watch in the networking space. On the valuation, Riverbed recently pulled back $10 from an all-time high and I used the opportunity to pick up some shares. The P/E is a palatable 30, given a growth rate in excess of 40%. The PEG is now 1.40, which is well of recent highs. You have to pay up for this company because it has such huge prospects.

(Disclosure: Long RVBD).

Wow. Cisco. Who would have thunk the stock would be back below $20 when the new bull market in technology is pushing many shares to new highs. CEO John Chambers is still smiling on TV, but you know he is seething behind the scenes.

Where to start... there are so many things wrong with Cisco right now I'm not sure what to pick first. On a technical market level, it's clear to me that Cisco shares are being sold on strength. Last week's puke-out  in which Cisco lost 20% of its market cap came on gigantic volume.

On a strategic level, Cisco is adrift and its M&A strategy has been flawed. It has focused far too much on video and consumer products and less on cloud-computing infrastructure. I have been writing about this on Enterprise Efficiency.Cisco was buying flip-cams and settop boxes when it should have been focused on the cloud.

If only you could have the problem of having a 2% investment in a company whose share price has gone to the moon, right? Well, that's where Cisco is with VMware. While its equity stake looks smart at this stage, in the longer term Cisco is going to have to make a bid for either EMC (VMWare's parent company) or figure out the next step to get in the virtualization game.

Here's the problem: Virtualization and cloud computing, VMware's bread-and-butter, is the technology flavor of the decade, and Cisco is relying heavily on a strategic partnership with VMware to get it done. Sources in Silicon Valley are chattering about what Cisco will do about virtualization, a party its been largely left out of. As VMWare's price has shot up while Cisco's share price has stagnated, it's now become all but unaffordable to for Cisco -- VMware now has a market capitalization of $33B.

This bidding war between HP and Dell for 3Par says something to me about big technology companies: They are stuck. They can't grow internally, so they have to look outside the company.

If you think about the evolution of all big industries, they trend toward consolidation and giant companies eating up new companies in the search for growth and innovation. This certainly appears to be the case with players like HP, Dell, Microsoft, and Cisco. The new innovation is not coming from within, it's coming from outside.

After months of talking to smart people and taking notes, my latest notebook is filled. Usually what I do at this point is read back through the whole thing to see if there are any nuggets that I missed or forgot about.

Why not just dump it straight onto the Web? This is stuff that real people are saying in the real world. For your pleasure, here you go:

Something on Cisco's earnings call last night went terribly wrong. In a rational business sense, Cisco made plenty of money, even though they missed analyst estimates: $1.9B in profit and $40 billion in revenue for the first time in the company's history really isn't that shabby.

But something else was going on. The conference call was awful. It did not inspire confidence. Cisco executives bungled words, proceeded with a new "four-part" format as if they were trying to choreograph an opera at the Met, and struggled to explain the business climate. Even John Chambers himself, master of the bullish technology catchphrase, seemed to have trouble elucidating exactly what the problem was.

"We think the words unusual uncertainty are ... a description of what's happening."

Whaaa? Had we been suddenly been dropped into some metaphysical California Yoga retreat? Unusual uncertainty? What is that? That's not the Chambers I know. That's downright whimpy.

Cisco shares are getting hammered nearly 6% after hours after the company missed targets set by analysts.

The company said in a release that it earned $1.9 billion, or 33 cents per share, in the fiscal fourth quarter that ended July 31. That is an increase of $1.1 billion, or 19 cents per share, over a year ago. But analysts had expected 42 cents in earnings. Overall revenue grow to a record $40 billion.

That's a big miss, especially for Cisco, a company that often beats estimates. Given that it's a technology bellwether and often looked to for guidance on the economy as a whole, it will likely add to pressure on the general market tomorrow.

I don't want things to fall apart in the stock market. No really, I don't. But the unusual level of "CNBC Optimism" combined with a bad chart, and terrible reactions to so-called "good news" today are all leading indicators, to me, that all is not well in market land. Let's take a look at these items one-by-one: 1) A $6B deal between SAP and Sybase is announced. It can't help the market though. As I like to say, it's not the news but the reaction to the news that matters. The market's reaction was muted, at best. Tech stocks have been selling off all day. 2) Even John Chambers can't save the market. When America's most polished optimist, John Chambers, announces a "great quarter" and comes on CNBC, but the market sells off, that's a bad sign. Cisco reported its "strongest quarter ever," but the stock has sold off nearly 5% so far today. Hmmm. 3) The S&P chart, which I commented on here, is looking more and more awful. Following the trillion-dollar Euro bounce, further gains have been muted, and we are getting yet another rounded top in the context of a scary looking waterfall like pattern. You think all those High Frequency Trader (HFT) programs are done with their mini-panics? I don't. On the chart below, I have shown the downward angle of the top we've formed in the last few weeks, as well as circle the area where that interesting "panic gap," was created after the Euro bailout was announced. Notice that the "Euro Bailout Rally" is now just a blip in the overall chart. For whatever reasons, markets like to gravitate back to areas of huge turbulence -- especially when there was a large gap. This is what I expect to happen to this market. That area will be tested again and either fail or succeed. Disclosure: Short S&P (stop at 1175), long S&P puts.

HP is starting to sound like the first year of the Obama Adminstration. They have their own version of fixing the economy, winning a war, and giving everybody health insurance -- it's beating Cisco with 3Com and then conquering the mobile-phone market with today's announcement that they'll buy Palm for $1.2B. Is HP biting off more than they can chew? Can't say we were right about Palm, or were we? HP did the deal at $1.2B. It surprises me. My premise was that paying over $1B for a company that is losing money and market share, with a negative book value, and $400B in debt is just slightly nutty, but what do we know. Apparently the HP CFO knows more than me.

LAS VEGAS -- Demonstrating HP's feisty attitude in its escalating networking row with Cisco, HP Network Chief Technologist Paul Congdon attacked Cisco's dominant position in the networking business, saying it is leading to "crazy behavior" and overpriced products. At the top of Congdon's  list of industry problems? "Lack of Competition." This is leading to "crazy behavior... causing you to pay too much for your networking equipment," said Congdon, on a panel titled " Why Networking Must Change," Congdon did not name Cisco by name. But it was clear who it was when he remarked that "In most industries, the market share is separated by 10 percentage points..." Take a look at the chart below and conclude what you may. Congdon's solution for customers? "Open up and write your own RFPs." More standardization would help too. But Congdon's contribution wasn't all Cisco bashing. He also had a  list of trends for the industry. Other than "Cisco Charges Too Much," Here are the rest... * Growing complexity in networks is breeding inefficiency * Massive growth in Internet- connected devices, projecting to 20 million new video-enabled mobile devices in 2010 alone * Scaleability requiring more networking intelligence on the edge of networks * Applications need to be dynamically adaptable to the network, rather than vice-versa Did Cisco respond? Not really. Thomas Scheibe, Director of Data Center Switching, the Cisco representative on the panel, remained civil -- and boring. He kept to a script that involved heap of Layer 2 switch fabrics, mobility, and virtualization. Congdon's got a point -- though it's not really clear how easily HP or anybody else can do anything about it. Networking upstarts have been trying to create "best-of-breed" products with more aggressive price/performance technology to take on Cisco -- and not making a lot of progress. See the chart below. Doug Gourlay, VP of Marketing from Arista Networks, took another jab at Cisco: "Many of the incumbents have used switching and routing technologies as cash cows to  fund entrance into marketing adjacencies to bring us wonderful technologies such as Flip cams." That drew laughter from the audience, which then went back to taking notes on future data-center virtualization.