MOST NOTEWORTHY: Syneron Medical, Cellcom Israel, GATX Corp and TNS, Inc were today's noteworthy upgrades:

• Merriman upgraded shares of Syneron Medical (NASDAQ:ELOS) to Buy from Neutral following the Q1 results to reflect the introduction of LipoLite and the company's global distribution channel. They believe shares can trade towards the $22-$26 level.
  
• Jefferies upgraded Cellcom Israel (NYSE:CEL) to Buy from Hold following the company's Q1 results to reflect its improved EBITDA outlook.
  
• Morgan Keegan upgraded GATX (NYSE:GMT) to Outperform from Market Perform as they believe the company has increased opportunities to deploy capital given the current state of the market for railcars, which should result in share outperformance.
  
• Suntrust raised TNS, Inc (NYSE:TNS) to Buy from Neutral citing improved execution and the global shift towards electronic transactions.

OTHER UPGRADES:

• Chevron (NYSE:CVX) was raised at UBS to Buy from Neutral.
  
• RBC Capital upgraded TeleTech Holdings (NASDAQ:TTEC) to Sector Perform from Underperform.
  
• Citigroup upgraded SINA Corp (NASDAQ:SINA) to Buy from Hold.

MOST NOTEWORTHY: NDS Group plc (NNDS), Payless ShoeSource, Inc (PSS), Southern Union Co (SUG) and Take-Two Interactive Software, Inc (TTWO) were today's noteworthy initiations:

• B. Riley believes NDS Group (NASDAQ: NNDS) is in an attractive space with 42M digital TV subscribers, increasing competition between TV service providers and declining digital deployment costs, starting shares with a Buy rating and $66.50 target.
• KeyBanc McDonald initiated shares of Payless ShoeSource Inc (NYSE: PSS) with a Buy rating and $42 target.
• Calyon started Southern Union Co (NYSE: SUG) with a Buy rating and $38 target and sees positive catalysts over the next 12-18 months, including a potential takeover or monetization and the formal creation of an MLP.
• Take-Two Interactive Software (NASDAQ: TTWO) was started with a Hold rating at Needham. The firm finds it unlikely that shares will outperform until new management sets forth their new plan, which is expected to take 3-6 months.

OTHER INITIATIONS:

• Credit Suisse imitated Akamai Technologies, Inc (NASDAQ: AKAM) with an Outperform rating and $65 target.
• American Technology believes Cadence Pharmaceuticals, Inc's (NASDAQ: CADX) two late-stage products fill an important, unmet medical need and started the company with a Buy rating and $24 target.
• UBS started shares of NuStar GP Holdings, LLC (NYSE: NSH) with a Neutral rating and $30 target.
• TeleTech Holdings, Inc (NASDAQ: TTEC) was initiated with a Buy rating at Merrill Lynch.

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

Wall Street's equity market offers another solid schedule this week, with 12 deals on the docket, including 7 IPOs and 5 Secondaries. Those deals tentatively scheduled to price include:

IPOs:

Monday

Aruba Networks (ARUN), an 8M-share IPO for secure wireless systems company. JP Morgan Chase and Lehman Brothers are the lead managers. Filing range: $8.00-$10.00.

Wednesday

eTelecare Global Solutions (ETEL), a 5.5M-share IPO for this call center company. Deutsche Bank is the lead manager. Filing range:
$12.50-$14.50.

Thursday

GSI Technology (GSIT), an 8M-share IPO for this semiconductor company. Needham and W.R. Hambrecht are the lead managers. Filing range: $6.50-$8.00.

Senorx (SENO), a 5.5M-share IPO for this medical devices company. Bank of America and Citigroup are the lead managers. Filing range: $11.00-$13.00.

Super Micro Computer (SMCI), an 8M-share IPO of this network servers company. Merrill Lynch is the lead manager. Filing range $9.50-$11.50.

Friday

Flagstone Reinsurance (FSR), a 13M-share IPO for this reinsurance company. Lehman Brothers and Citigroup are the lead managers. Filing range: $12.50-$14.50.

Western United Financial (WNF), a 6.4M-share IPO for this business financing company. Sandler O'Neill is the lead manager. Filing price: $8.00.