Here are some highlights from this past week's earnings coverage on BloggingStocks:

• Abercrombie & Fitch Co. (ANF) lower Q3 results still topped expectations and sent shares higher.
• Applied Materials Inc. (AMAT) posted much better-than-expected Q4 earnings, the first profit in a year.
• AstraZeneca (AZN) received an analyst's downgrade due to concerns over its earnings prospects.
• Blackstone Group (BX) received an analyst's upgrade following the company's Q3 results.
• Blockbuster Inc. (BBI) widened its net loss in Q3 and revenue and same-stores sales declined.
• Clean Energy Fuels Corp. (CLNE) shares declined after its Q3 numbers fell short of expectations.
• Consolidated Water Co. Inc. (CWCO) earnings prospects for 2010 earned it an analyst upgrade.

"The term cloud computing is nothing particularly new or complicated; it simply means that instead of having software on your home, office or notebook computer, you run applications over the Internet," explains Gregg Early.

In Personal Finance says, "It's the way of the future as computing becomes increasingly mobile." Here, he looks at a trio of plays on this trend: Amazon.com (NASDAQ: AMZN), Salesforce.com (NYSE: CRM), and Rackspace Hosting (NYSE: RAX).

"I would point out that I'm writing this article on Google Docs. This document is stored on a Google server farm, not on my office computer.

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.

Analyst upgrades:

• Wachovia upgraded shares of The Goldman Sachs Group Inc (NYSE: GS) to Outperform from Market Perform on expectations for greater pricing power given Goldman's position as the largest remaining independent securities firm.
• Keefe Bruyette upgraded Investment Technology Group Inc (NYSE: ITG) to Outperform from Market Perform as they believe the company will take market share with the reshaping of the large wire-house brokerage community. The company's target was raised to $37 from $33.
• Broadpoint raised Hoku Scientific Inc (NASDAQ: HOKU) to Buy from Neutral as they believe the contract with Tianwei New Energy reduces financing risk.
• ACE Ltd (NYSE: ACE) and The Travelers Companies Inc (NYSE: TRV) were upgraded to Buy from Neutral at Goldman.
• Axcelis Technologies Inc (NASDAQ: ACLS) was upgraded to Buy from Hold and Evergreen Solar Inc (NASDAQ: ESLR) was lifted to Hold from Sell at Citigroup.

Analyst downgrades:

For the most part, the IPO market has been horrible this year. In fact, according to a report from Reuters, only three IT (information technology) companies have gone public this year.

Despite this, web-hosting company Rackspace (NYSE: RAX) still went ahead with its IPO this week. And, it was pretty bad for investors. On its opening day, the stock price plunged 20% to $10. Ironically enough, Wall Street was hoping that the Rackspace deal would help spark the IPO market.

After all, Rackspace is a great company. Keep in mind that its investor roster includes biggies like Norwest Venture Partners and Sequoia Capital.

Moreover, unlike other upstart tech IPOs, Rackspace has a strong history of profitability. In Q1, net income was $5.4 million. Rackspace is also growing at a torrid pace, with Q1 revenues at $119.6 million, up from $75.2 million in the same period a year ago. There are 33,000 customers.

However, Rackspace must deal with tough competitors, such as IBM (NYSE: IBM), AT&T (NYSE: T) and even Amazon.com (NASDAQ: AMZN), which offers a variety of cloud-computing services. Furthermore, the slowing economy may put pressure on IT budgets, which could be a problem for Rackspace going forward.

Tom Taulli is the author of various books, including The Complete M&A Handbook and The Edgar Online Guide to Decoding Financial Statements. He also operates MergerBook.com.

Darren Shafae operates Paper-Check.Com, which is a proofreading business. Without web-based technologies, his business would probably be far smaller.

"I have taken the best of ideas I have seen, and refined them to meet our needs and improve work flow and customer and employee satisfaction," said Shafae.

So, what kinds of applications does Shafae use to improve his business? Well, let's take a look:

GotVMail: Basically, this is a virtual PBX system. In other words, there is no need to manage hardware or pay for consultants. Instead, Shafae pays for the service on a subscription basis.

Some of the features include custom greetings, multiple extensions, music-on-hold, toll-free numbers, Dial-By-Name Directory and so on. According to Shafae: "GotVMail offers professional voice talent that gives the impression that there are thousands of operators standing by to address client needs and concerns."

Back in 2000, Rackspace attempted an IPO. Of course, the dot-com implosion derailed those plans.

Well, now the company is back and its IPO prospects look much better.

Rackspace is a giant in the web hosting industry. While the company has a solid infrastructure, it also has an extreme focus on customer service. In fact, the company terms it "Fanatical Support" (which is trademarked).

By the end of 2007, Rackspace had more than 29,000 customers. Actually, over the past five years, revenues have soared from $56.6 million to $362 million,a 59% annual growth rate. The company also posted a $17.8 million profit last year.

What's more, the prospects for the global hosting market look bright. According to Tier1Research, the market is expected to grow 26% per year to $24.4 billion by 2010.

The lead underwriters on the IPO include Goldman, Sachs & Co. (NYSE: GS), Credit Suisse (NYSE: CS) and Merrill Lynch & Co. (NYSE: MER). You can find the prospectus at the SEC website.

Tom Taulli is the author of various books, including The Complete M&A Handbook (www.mergerbook.com) and is also a principal in Averiware, which provides an ERP system to small and midsize businesses.