The Association of Authors' Representatives holds the occasional panel for industry folks (usually above the Hard Rock Cafe in Times Square - no kidding). Last week I attended one on e-platforms and author web-marketing. A few of the social-networking sites mentioned I knew (Goodreads, MySpace, Facebook, Twitter etc), but a few were new to me, like Library Thing, Shelfari, and Google Profile. These are tremendous tools for authors, who simply must have a strong web-presence to survive.
(For more online book-love, check out Booktumbling, a current pet obsession...)