Analyst upgrades:

• Axys Tech (NASDAQ: AXYS) was upgraded to Outperform from Market Perform at Morgan Keegan on valuation.
  
• Credit Suisse upgraded Cemex (NYSE: CX) to Neutral from Underperform following the company's refinancing announcement.
  
• Patni Computer (NYSE: PTI) was upgraded to Buy from Neutral at UBS.

Analyst downgrades:

• Merriman downgraded Environmental Power (NASDAQ: EPG) to Neutral from Buy citing a lack of visibility into the company's capital raise and lowered their estimates to reflect a slippage in project schedules.
  
• Jefferies cut inVentiv Health (NASDAQ: VTIV) to Hold from Buy as they believe budget cuts at the company's client base make 2009 estimates too high. The firm lowered their target to $11 from $15.
  
• Oppenheimer downgraded RSC Holdings (NYSE: RRR) to Perform from Outperform to reflect the continued deterioration in non-residential construction and valuation following the recent rally.
• Smurfit-Stone (NASDAQ: SSCC) was lowered to Hold from Buy at Deutsche Bank.
  
• Distribucion Y Servicio (NYSE: DYS) was downgraded to Sell from Hold at Deutsche Bank.
  
• Key Energy (NYSE: KEG) was downgraded at SMH Capital to Neutral from Accumulate.

Analyst initiations:

• AECOM Technology (NYSE: ACM) was initiated with an Outperform rating and $34 target at Baird. The firm is positive on AECOM's diverse portfolio of services and global reach.
  
• Baird also initiated Checkpoint (NYSE: CKP) with a Neutral rating and $11 target, citing the weak macro environment.
  
• Thomas Weisel said Integra LifeSciences (NASDAQ: IART) has little exposure to economically sensitive areas of healthcare and has a varied mix of products that provide a platform for sustainable organic growth. Shares were initiated with an Overweight rating.
• Piper Jaffray assumed CBS Corp (NYSE: CBS) with a Neutral rating.
  
• BioMarin (NASDAQ: BMRN) was started at Stanford with a Hold rating.
  
• Websense (NASDAQ: WBSN) was initiated with an Equal Weight at First Analysis.

Analyst upgrades:

• Calyon upgraded major network carriers based on falling oil prices and capacity cuts. The analyst is positive over the next 12 months but cautious short-term given the uncertain economy, and volatile markets and oil prices. AMR Corp (NYSE: AMR) and Delta Air (NYSE: DAL) were upgraded to Add from Neutral and UAL Corp (NASDAQ: UAUA) was raised to Neutral from Reduce.
• Ryanair (NASDAQ: RYAAY) was upgraded at Citigroup to Buy from Hold.
• Boardwalk Pipeline (NYSE: BWP) was raised to Buy from Hold at Deutsche Bank.
• Cowen lifted Biogen Idec (NASDAQ: BIIB) to Outperform from Neutral.
• JP Morgan upgraded Choice Hotels (NYSE: CHH) to Neutral from Underweight following the better-than-expected Q3 report.
• Oppenheimer upgraded shares of Integra LifeSciences (NASDAQ: IART) to Outperform from Perform on valuation, the company's minimal exposure to economic conditions, and expectations for margin improvement and a rebound in organic growth.

Analyst downgrades:

• Sherwin-Williams (NYSE: SHW) and AerCap Holdings (NYSE: AER) were downgraded to Neutral from Overweight at JP Morgan.
• UBS downgraded Embarq (NYSE: EQ) to Neutral from Buy following the CenturyTel (NYSE: CTL) merger announcement.

Analyst upgrades:

• Citigroup upgraded shares of Salesforce.com (NYSE: CRM) to Buy from Hold on valuation following the recent weakness and expects positive seasonality in the second half of 2008.
  
• Gilat Satellite (NASDAQ: GILT) was upgraded to Outperform from Market Perform at William Blair on valuation.
• Cott Corp (NYSE: COT) was raised at UBS to Neutral from Sell.
  
• EOG Resources (NYSE: EOG) was upgraded to Market Perform from Underperform at Bernstein.
  
• Integra LifeSciencues (NASDAQ: IART) was raised to Buy from Hold at Argus.

Analyst downgrades:

• Jefferies downgraded shares of Marvell Tech (NASDAQ: MRVL) to Hold from Buy on HDD inventory concerns and share loss at Research in Motion (NASDAQ: RIMM) after checks indicated MRVL likely lost the design for the RIM Javelin to Freescale. The firm lowered their target to $15 from $22.
  
• Oppenheimer downgraded Integrated Device (NASDAQ: IDTI) to Perform from Outperform as they believe the upcoming Intel (NASDAQ: INTC) server memory transition will pressure shares for several quarters.
  
• Broadpoint downgraded shares of Healthaways (NASDAQ: HWAY) to Neutral from Buy as they see few near-term catalysts.

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

• Big Lots Inc. (NYSE: BIG) Q1 earnings rose 20%, driven by cash-strapped bargain hunters.
• Borders Group Inc. (NYSE: BGP) narrowed its loss in the first quarter though same-store sales fell.
• Costco Wholesale Corp. (NASDAQ: COST) Q3 profits climbed 32%, beating analysts' estimates.
• Dell Inc. (NASDAQ: DELL) posted solid Q1 results that beat analysts' expectations (see the transcript).
• DSW Inc. (NYSE: DSW) Q1 earnings declined, hurt by weak same-store sales.
• H.J. Heinz Co. (NYSE: HNZ) better-than-expected Q4 results sent the stock to a 52-week high.
• Integra LifeSciences Holdings Corp. (NASDAQ: IART) beat Q4 estimates and offered Q1 guidance.
• J. Crew Group Inc. (NYSE: JCG) lowered its full-year forecast, leading to analyst downgrades.
• Joy Global Inc. (NASDAQ: JOYG) Q2 results beat expectations, and it raised its full-year guidance.
• Lions Gate Entertainment Corp. (NYSE: LGF) posted record Q4 revenues but a bigger-than-expected loss.
• Marvell Technology Group (NASDAQ: MRVL) Q1 profits beat estimates and led to analyst upgrades.
• Medtronic Inc. (NYSE: MDT) beat Q4 estimates and offered full-year guidance.
• Novell Inc. (NASDAQ: NOVL) swung to a profit that was in line with analysts estimates.
• Salesforce.com Inc. (NYSE: CRM) Q1 revenues surged on new customers and demand in Asia.

Integra LifeSciences Holdings (NASDAQ: IART) is a regenerative medicine specialist. The firm develops, manufactures and markets surgical implants and medical instruments that are used in neurosurgery, extremity reconstruction, orthopedics and general surgery. Its biological implants, grafts, and wound dressings are based on a proprietary collagen matrix that becomes part of a patient's body and help it to generate new bone and tissue to replace damaged areas. The company's surgical instruments include ultrasonic surgical ablation systems and joint fixation devices used in neurosurgery and joint reconstruction. Integra has key strategic alliances with Johnson & Johnson (NYSE: JNJ), Wyeth (NYSE: WYE) and Zimmer Holdings (NYSE: ZHM).

The firm pleased investors last week, when it reported fiscal Q4 EPS of 54 cents and revenues of $157.65 million. Analysts had been looking for 49 cents and $153.41 million. Management also guided Q1 EPS to 39-42 cents (40 cent consensus), Q1 revenues to $155 million or more ($151.1M consensus), Q2 EPS to 45-48 cents (45 cent consensus), Q2 revenues to $159-$164 million ($160.10M consensus) and FY08 EPS to $2.00-$2.15 ($2.04 consensus).

MOST NOTEWORTHY: SanDisk (SNDK), Indevus Pharmaceuticals (IDEV), Integra LifeSciences (IART) and Level 3 Communications (LVLT) were today's noteworthy initiations:

• SanDisk (NASDAQ: SNDK) was initiated with a Neutral rating at Cowen, as the firm believes it could face challenges in Q4 NAND flash memory demand given supply.

• Rodman & Renshaw initiated shares of Indevus (NASDAQ: IDEV) with a Market Outperform rating and $10 target. The firm believes Indevus Nebibo and Sanctura XR upcoming events provide an attractive entry point.

• Morgan Stanley initiated shares of Integra LifeSciences (NASDAQ: IART) with an Equal Weight rating and $55 target, citing competitive risks from larger competitors.

• Shares of Level 3 Communications (NASDAQ: LVLT) were initiated at Raymond James with an Underperform rating, as the firm believes estimates will be difficult to achieve given high debt levels and free cash flow.

OTHER INITIATIONS:

• Cowen initiated shares of STEC Inc (NASDAQ: STEC) and Spansion (NASDAQ: SPSN) with Neutral ratings and shares of Silicon Motion Technology Corp (NASDAQ: SIMO) with an Outperform rating.

• Pacific Crest initiated shares of Universal Electronics (NASDAQ: UEIC) with a Sector Perform rating on valuation.

• Merrill Lynch started shares of FirstFed Financial (NYSE: FED) with a Sell rating.

• Goldman Sachs started shares of Herbalife (NYSE: HLF) with a Buy rating and $50 target.

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