Because god forbid I actually post links when I come across them:
Oh so long ago Flavorwire posted links to book trailers of the artsy variety. Flavorwire is fast becoming one of my favorite daily reads with offbeat reviews. I still need to check out Britten & Brülightly (samples of the illustrations can be found here).
As a follow up to the BSU Tweet Camp, check out these examples of Publishing Professionals using Twitter.
The Greenlight Bookstore is almost on its way, and they're looking for a few good volunteers. If you're in the greater Brooklyn area, you should check them out.