Cloud computing is a type of on-demand hosting services on the internet. Not only a necessity for mainstream e-commerce sites, it also increases efficiency, is scalable, and lowers expenses. The monetary savings may be misleading to consumers and businesses who do not fully understand the potential risks involved.

With a pay-as-you-go type structure, users are only charged for the amount of traffic, bandwidth, and memory used. Online businesses become more efficient by only utilizing the storage and space needed, while also being assured capacity for any usage increases. The buzz has been building for years, so cloud computing has attracted a diverse customer base, ranging from popular social networks such as Twitter and Facebook, to educational websites of Arizona State and Northwestern University.

Nothing is worse than repeating past mistakes. Despite the awful economy, my newest portfolio is doing better than any other since 1999-2000, actually passing a 100% gain recently, although it has dropped back slightly with the market the past few trading days.

Ten years is recent enough for me to remember giving everything back and then some. I'm not doing that again. But what to do? I certainly do not like sitting with a heavy cash position collecting almost nothing. I have recently discussed this issue, see: Serious Money: ETF that's better than cash.

The solution is to find stocks that have low volatility, high yields, and the recurring revenue and strong cash flow to maintain the yield. Long term investors will not be surprised by my search leading me to AT and T (NYSE: T) and Verizon Communications (NYSE: VZ), the two largest communications companies in the land.

A race has broken out for Data Domain Inc (NASDAQ: DDUP). NetApp Inc. (NASDAQ: NTAP) offered $1.5 billion for the company two weeks ago, and EMC Corp. (NYSE: EMC) decided it had to get in on the action, upping the ante to $1.8 billion yesterday. Data Domain shares gained 16% on the news in late trading yesterday, resulting in EMC's bid carrying a 17% premium.

EMC sees Data Domain as its ticket into the market for software-based storage management, as the target company's products help reduce the amount of disk space needed to store data. With large, high-profile clients like AT&T Inc. (NYSE: T) and the U.S. Defense Department, Data Domain was able to double its top line to $274 million in 2008. It pulled in net income of $21.6 million last year, up from a loss of $3.7 million in 2007.

Apple, Inc.'s (NASDAQ: AAPL) iPhone 3G has admittedly caused problems for wireless partner AT&T, Inc. (NYSE: T). Little did AT&T know that so many iPhones would be sold and so much data would be pumped over its wireless network.

What would happen if a newer iPhone was announced and released this year that featured front-facing camera videoconferencing? Would the millions of iPhone users start sending out even more bucketloads of data doing a ton of live video over their iPhones?

AT&T, Inc. (NYSE: T) started unleashing its netbook wireless data plans and subsidized netbook PCs in select markets just this year. The nation's second-largest wireless carrier will now be rolling out the program nationwide this summer. That means customers will be able to purchase an ultraportable netbook PC with an AT&T wireless data plan anywhere AT&T's markets are. Call this unimportant, but it's a biggie for AT&T.

The one shining light of the PC industry for the last three quarters have been netbook sales. These sub-$500 book-sized PCs are perfect for travel and normal tasks like web surfing, email use and word processing and spreadsheets. Tap some kind of built-in broadband access inside these low-cost computers outside the standard but limited range of WiFi and you pretty much have a go-anywhere, compute-anything device way smaller than most textbooks.

Analyst upgrades:

• Morgan Stanley said Bank of America's (NYSE: BAC) capital needs are largely known and shares are trading "cheaply despite reduced downside risk." The firm upgraded shares to Overweight from Underweight and raised the price target to $25 from $16. Shares were also upgraded to Outperform from Neutral at Baird citing manageable capital needs and attractive risk/reward.
  
• Keefe Bruyette upgraded Fifth Third Bancorp (NASDAQ: FITB) to Outperform from Market Perform on valuation as it views the stock as inexpensive despite the recent rally. The firm has an $8 target on the stock.
• Banc of America/Merrill upgraded Ericsson (NASDAQ: ERIC) to Buy from Neutral as it believes fewer hedging losses could bring upside over the next few quarters.
• Rio Tinto (NYSE: RTP) was raised to Overweight from Neutral at Barclays.
  
• EnerNOC (NASDAQ: ENOC) was lifted to Buy from Neutral at Janney Montgomery.
  
• Westpac Banking (NYSE: WBK) was upgraded to Neutral from Underperform at Credit Suisse.

Verizon Communications, Inc. (NYSE: VZ) reported Q1 earnings on Monday, and they didn't disappoint. The telecommunication entity said it earned $0.63 per share on an adjusted basis. Okay, the growth wasn't so great. The company earned an adjusted $0.61 per share in the year-ago period. But you know the game: it's all about expectations. So, on that count, Verizon was ahead by four pennies, according to this database.

But the Verizon story isn't just about earnings. It's also about cash flow. Net cash from operations increased 19% to $6.4 billion. Free cash flow more than doubled to $2.7 billion. Verizon is a well-known dividend-paying stock, so shareholders definitely want to see good cash flows.

Analyst upgrades:

• Citigroup upgraded Research in Motion (NASDAQ: RIMM) to Buy from Hold and added the stock to its Top Picks Live List. The firm believes RIMM's outlook is more secure given its unit growth trajectory and stabilizing margins. Citi raised its target on the stock to $100 from $65.
  
• Morgan Stanley upgraded Microsoft (NASDAQ: MSFT) to Overweight from Equal Weight following the company's Q3 results it believes growth is accelerating and expectations are low. The firm raised its target on the stock to $24 from $21.
  
• Deutsche Bank upgraded Huron (NYSE: HURN) to Buy from Hold as it believes bad news is already priced in and FY09 expectations are achievable. The firm keeps a $46 target on the stock.
• Credit Suisse (NYSE: CS) was upgraded to Neutral from Sell at UBS.
  
• Quicksilver (NYSE: KWK) was raised to Buy from Neutral at Banc of America/Merrill.
  
• EIG Resources (NYSE: EOG) was lifted at Goldman to Conviction Buy from Neutral.

AT&T (NYSE: T) closed at $25.29. T is reporting Q1 EPS before the open on April 22. May option implied volatility of 41 is below its 26-week average of 46, according to Track Data, suggesting decreasing price movement.

Exxon Mobil (NYSE: XOM) closed at $65.29. XOM is expected to report Q1 EPS on April 30. Crude oil futures are recently up 0.26% to $46 according to Bloomberg. May option implied volatility of 36 is below its 26-week average of 42, according to Track Data, suggesting decreasing price fluctuations.

Option Update is provided by Stock Specialist Paul Foster of theflyonthewall.com

When Sprint Nextel Corp. (NYSE: S) launched the $50 all-you-can-eat wireless plan with its Boost Mobile prepaid brand back in January, it was a shock to the wireless industry. Indeed, prepaid wireless generally is more expensive and less feature-laden than contract wireless in the U.S. But not even contract wireless plans that featured unlimited talking/texting/web access could be found for $50. What was Sprint Nextel trying to do? Cannibalize itself?

Last week, my colleague Brian White wondered if AT&T will maintain its exclusive contract for Apple's iPhone. Brian's especially relevant question came exactly one week before AT&T (NYSE: T) is set to step into the earnings spotlight -- this Wednesday.

MarketWatch contends that this exclusivity is the reason AT&T will post "solid first-quarter results." It is MarketWatch's belief that the exclusivity may actually hurt AT&T because of how heavily subsidized upfront sales are for consumers.

The heavy subsidies may be worth the potential cut in earnings for AT&T, as the wave of neo-tech hipsters desiring the latest in phone technology has boosted AT&T's subscriber growth and wireless revenue.

AT&T Inc.'s (NYSE: T) decision to partner with Apple, Inc.'s (NASDAQ: AAPL) iPhone back in the summer of 2007 was one of the best decisions the company has made in a decade. Not only did that single move bring millions of customers to the wireless carrier in recent years, it has kept them there (for at least two years per the iPhone service contract) and will keep on keeping them there. That is, unless the iPhone comes to another wireless company in the U.S.

AT&T, Inc (NYSE: T) let five union contracts expire over this past weekend. With 80,000 of its U.S. workers now operating under no labor contract at all, the telecom giant is in the process of negotiating new terms before those workers are told to strike by their unions.

AT&T shares are now almost at the same level as three years ago (with a rise in '07 and '08), and investors are asking why workers are being treated like royalty. Are they?

Four weeks in a row of gains were met with at least the first day of the week having sellers win over buyers. The good news is that the market came back at the end of the day. We might have closed up if we had another hour of trading on the clock.

Geithner's comments about running out management and boards of directors at banks which need capital did not help, nor did an influential banking analyst coming out with very negative coverage of the sector at a new firm. Here were today's closing bell levels:

Dow 7,975.85 -41.74 (-0.52%)
S&P 500 835.48 -7.02 (-0.83%)
Nasdaq 1,606.71 -15.16 (-0.93%)

Top Analyst Upgrades
Top Analyst Downgrades

TheStreet.com's Jim Cramer says if you don't want to wait for a pullback, look abroad for the next leg or find values at home.

What do you do when everyone knows we have come up too far, too fast; no one knows who is actually buying; and we are going into earnings season?

What do you do when the animal spirits are taking up the market and yet other than a handful companies -- Research In Motion (NASDAQ: RIMM) (Cramer's Take), Xilinx (NASDAQ: XLNX) (Cramer's Take), Corning (NYSE: GLW) (Cramer's Take), Best Buy (NYSE: BBY) (Cramer's Take) and Taiwan Semi (NYSE: TSM) (Cramer's Take) -- almost all companies that have spoken during the "off-season" earnings reports have been dismal?