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

• Bidz.com Inc. (NASDAQ: BIDZ) Q4 earnings release included notice about an SEC investigation.
• Dell Inc. (NASDAQ: DELL) saw net income drop by almost 50%, falling short of estimates.
• Ducommun Inc. (NYSE: DCO) received an analyst's downgrade after its Q4 earnings release.
• Gap Inc. (NYSE: GPS) said Q4 earnings fell due to weakness at Gap and Old Navy stores.
• General Motors Corp. (NYSE: GM) worse-than-expected results prompted speculation about its survival.

While the tough economy is pressuring information technology (IT) spending, there are still some growth areas. An example is security. Basically, it is a must-have technology – for essentially any environment.

And, one of the beneficiaries in the space is Sourcefire, Inc. (NASDAQ: FIRE). The company leverages an open source model --- for intrusion protection -- that has gained lots of traction over the past few years. Just take a look at its Q4 results.

Total revenues increased 33% to $25.7 million (full-year revenues were up 35% to $75.7 million). Earnings came to $2.3 million, or 8 cents per share. This compares to $800,000 or 3 cents per share in the same period a year ago.

It's been rough since Sourcefire Inc. (NASDAQ: FIRE) went public last year. The stock went from $18.83 to a low of $5. The company, which provides cutting-edge security technologies, has been missing analyst estimates and can't seem to get the confidence of investors.

Well, Sourcefire has now attracted a hostile bidder -- Barracuda Networks, which is offering $7.50 per share. As a result, Sourcefire's stock price is now trading at about $7.65. Of course, the company has rejected the offer (indicating that is far too low).

To get a perspective on things, I had a chance to talk to Nick Selby, who is the senior analyst of enterprise security at the 451 Group. According to him, the bid is indeed too low. If anything, this could entice other bidders to the table.

In fact, he thinks other broken IPOs may be buyout targets, such as ArcSight (NASDAQ: ARST).

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.

MOST NOTEWORTHY: Cisco Systems, Kirby and First Fed Financial were today's noteworthy downgrades:

• UBS downgraded Cisco (NASDAQ: CSCO) to Neutral from Buy after channel checks indicated orders are slowing, which gives them concern over the July quarter.
  
• Stephens cut Kirby (NYSE: KEX) to Equal Weight from Overweight as they believe a good 2008 is already priced into shares and that the liquid barge industry cycle may be nearing a top.
  
• First Fed Financial (NYSE: FED) was lowered to Neutral from Outperform at Credit Suisse, citing credit quality deterioration.

OTHER DOWNGRADES:

• JP Morgan removed HB Fuller (NYSE: FUL) from its Focus List.
  
• RBC Capital downgraded SourceFire (NASDAQ: FIRE) to Sector Perform from Outperform.
  
• Goldman cut Lloyds TSB Group (NYSE: LYG) to Sell from Neutral.

MOST NOTEWORTHY: Toyota Motor Corp (TM), J.B. Hunt Transport Services (JBHT), SourceFire (FIRE), Kohl's Corp (KSS) and Millennium Pharmaceuticals (MLNM) were today's noteworthy upgrades:

• Goldman upgraded shares of Toyota Motor Corp (NYSE: TM) to Buy from Neutral to reflect expectations for greater operating profits and margin expansion in 2007.

• Keybanc upgraded shares of J.B. Hunt Transport (NASDAQ: JBHT) to Buy from Hold based on increased conviction in JBHT's ability to increase intermodal volumes, easier 2H and 2008 comps, buybacks and valuation.

• Jefferies upgraded SourceFire Inc (NASDAQ: FIRE) to Buy from Hold after their checks indicated better Federal IT spending and solid sales activity.

• Kohl's Corp (NYSE: KSS) was raised to Outperform from Neutral at Baird on valuation.

• Millennium Pharmaceuticals (NASDAQ: MLNM) was upgraded to Market Perform from Underperform at Friedman Billings, citing recent monthly Velcade prescription trends for the move higher...

OTHER UPGRADES:

• Credit Suisse upgraded Arch Capital Group (NASDAQ: ACGL) to Buy from Neutral.

• Bear Stearns raised Parexel International Corp (NASDAQ: PRXL) to Peer Perform from Underperform.

• Morgan Joseph upgraded West Marine (NASDAQ: WMAR) to Buy from Hold.

• Morgan Keegan raised Cost Plus Inc (NASDAQ: CPWM) to Market Perform from Underperform.

Analyst summaries provided by TheFlyOnTheWall.com (subscription required).

MOST NOTEWORTHY: CKE Restaurants (CKR), Cardinal Health (CAH), eBay (EBAY) and CA Inc (CA) topped today's noteworthy initiation list today:

• Nollenberger believes the Hardee's franchise is entering a period of accelerated growth and initiated shares of CKE Restaurants (NYSE: CKR) with a Buy rating and $27 target.

• Goldman views Cardinal Health (NYSE: CAH) as a as a high quality, focused franchise with strong fundamental outlook driven by margin expansion and improvements in non-drug wholesale businesses and restructuring efforts, reinstating its Buy rating on the company.

• American Technology initiated eBAY Inc (NASDAQ: EBAY) with a Buy rating and $43 target, believing the company is the top play on growth of U.S. e-commerce and they expect upside to numbers tonight.

• Needham believes CA Inc (NYSE: CA) Inc remains in transition as it continues to work on the repackaging of its vast product array into five solution sets and started the company with a Hold rating.

OTHER INITIATIONS:

• Lazard initiated F5 Networks Inc (NASDAQ: FFIV) with a Buy rating and $100 target.

• Citigroup started Clearwire Corp (NASDAQ: CLWR) with a Hold rating and $23 target.

• Morgan Stanley assumed coverage of Vornado RealtyTrust (NYSE: VNO) with an Equal Weight rating.

• SourceFire Inc (NASDAQ: FIRE) was initiated with a Hold rating and $12 target.

• The Wet Seal (NASDAQ: WTSLA) was initiated with an Outperform rating at Cowen.

• Roth Capital initiated shares of Vivus Inc (NASDAQ: VVUS) with a Buy rating and $15 target.

Analyst summaries provided by TheFlyOnTheWall.com (subscription required).

It does look like the IPO market is staging a comeback. But there are still perils.

Just take a look at Sourcefire Inc. (NASDAQ: FIRE). The company went public in mid March at $15 and quickly moved to a high of $18.83.

Well, investors got a rude shock yesterday as the shares plunged 29% to $12.28.

Basically, the company violated a cardinal rule in IPOs: it will miss its first quarterly numbers as a public company. In fact, the company expects to post a loss of $2.2 million to $2.6 million for the fiscal fourth quarter.

Sourcefire is a cutting-edge security company that sells to big-time clients. What's more, the company has a very popular open source version of its technology. All in all, it's a good IPO candidate -- but apparently management is not doing a good job in dealing with Street expectations.

I had a chance to talk to Nick Selby, who is the senior analyst of enterprise security at the 451 Group. According to him:

"Sourcefire has profited mightily by deftly walking a marketing line that has got investors thinking it's both a security company and an open source company. We argue that this 'open source premium' has contributed to the company's successful IPO: investors think security equals growth and open source equals cost savings.

"Sourcefire has a lot going for it, but it does have to meet its targets. Although, in the past it has met privately stated goals and its unofficial ballpark numbers."

Tom Taulli is the author of various books, including the Complete M&A Handbook and the EDGAR-Online Guide to Decoding Financial Statements.