Everything links to everything else. I found an application called Shelfari that allows you to show what books you've read, are reading, or that you own. I learned about it through Facebook. I figured out how to make the changes to my Shelfari book collection show up on Facebook, the Shelfari web site, my Naymz page, and here.
I can't decide if this is geeky, cool, or a little of both.