FriendFeed
OK, now this really works for me as a concept. Friendfeed brings all of your different social networking accounts together in one spot. So for me, all of my blog posts, my del.icio.us links, my StumbleUpon items, my Netflix queue, my GoodReads profile, and much much more are on a handy-dandy list that all of my Friends (both real life and virtual can view.)
To take a look at my page, just stop by here. Perhaps I should warn you upfront about my strange taste in films. Ah well. The account is easy to set up and adding the different services is quite easy too. Slick as can be and lots of fun!