Analyst initiations: BBBB, RUTH, TXRH, STV and MAIN

MOST NOTEWORTHY: Blackboard, Ruth's Chris Steak House, Texas Roadhouse, China Digital and Main Street were today's noteworthy initiations:

Suntrust initiated shares of Blackboard (NASDAQ:BBBB) with a Neutral rating, as they sees risk to 2008 Street estimates due to minimal margin expansion.
Deutsche Bank started shares of Ruth's Chris Steak House (NASDAQ:RUTH) with a Hold rating, as they find it difficult to recommend a high-end dining chain in this economic environment.
The firm also initiated Texas Roadhouse (NASDAQ:TXRH) with a Buy rating and $15 target, citing the company's solid balance sheet, consistent operating history and low valuation.
Piper expects shares of China Digital (NYSE:STV) will move higher as investors recognize the growth potential of the conditional access card market in China. The firm started shares off with a Buy rating and $43 target.
Morgan Keegan resumed coverage of Main Street (NASDAQ:MAIN) with an Outperform rating and sees fair value range $15.50 to $17.00 based on MAIN's current yield of 9.2%.

OTHER INITIATIONS:

Societe Generale initiated Centrica PLC (CPYYY) with a Sell rating.
Conceptus (NASDAQ:CPTS) was initiated with a Buy rating and $27 target at Oppenheimer.
JP Morgan resumed coverage of Eastman Kodak (NASDAQ:EK) with an Underweight rating, and Infinera (INASDAQ:INFN) and Starent Networks (NASDAQ:STAR) with Overweight ratings.