My friend David Bridger has been researching Social Media and shares his new wisdom here.
If there's anything you want to know about Facebook, Shelfari, MySpace, Twitter, and a whole bunch of other social sites, some of which I'd never heard of--what the heck is *Plurk*?--check out David's review.
Oh, and feel free to friend me on Facebook if you haven't already. That's the only one I'm active on! Though David may be convincing me to spread out a little more. It's something to think about.