Social media marketing examples

In his blog, Peter Kim (ex Forrester analyst , ex Razorfish marketer) posts a great (and growing) list of how brands are usig online media (blogs, Facebook, Twitter) to extend their reach. Some of the examples were great for both the simplicity of the communication channel and the ability for community engagement.

Some of my favorite:

AMC's Mad Men. Microblogging: Fake Twitter accounts. [CHG: extend the life of your characters! brilliant]
BMW. Social networks: Facebook 1-Series Road Trip application. Rampenfest fan page.
Heinz. Online video: YouTube contest.
Motorola. Wikis: MOTO Q Wiki with how-tos on using the phone [CHG: because its so darn hard to use?]
United States House of Representatives. Microblogging: Twitter account. [CHG: really?]
Securities and Exchange Commission. Microblogging: Twitter account. [CHG: highly practical for hedge fund bankers to be alerter for upcoming regulation]
Virgin America. Microblogging: Twitter accounts for information and sales. [CHG: question is...any sales come out of this?]