From The Internet Retailer survey of IRNewsLink e-newsletter readers conducted in August 2009 with e-mail marketing and survey firm Vovici Corp:

Social marketing was a top priority for 49.5% of survey respondents this year, compared with 35.7% for video, 34.1% for blogs or customer ratings and reviews, and 22.5% for live chat or product personalization.

Lots of other interesting stats there about Emerchant priorities. Worth a look.