A few items of interest from BookExpo.
BookTour: Set up by Chris Anderson (Long Tail) to aggregate information about Author tours. (Around for a while but I've never mentioned it).
BookVideos.tv: Here are all the publishing clients and their videos using the BookVideos format. (Also around for a while).
MuseStorm: Widget maker working with publishing clients.
Mobifusion: A mobile platform that several publishers are using.
EarlyWord: A new blog/website launched by ex- Publisher's Weekly Editor & Chief Nora Rawlinson and ex- PW Publisher Fred Ciporen. The site aims to help Libraries with Collection Development and you can find out more about their philosophy on the site.
BigUniverse: Children's books that you can create yourself.
217Babel.com: Interesting collaborative writing project.