Don't pass by FriendFeed because you don't want to add a new social network to your arsenal — in fact, if you are suffering from social network overload, FriendFeed is exactly what you need.
Once you sign up for FriendFeed, you just pick and choose the networks that you want as part of your feed (Facebook, check, Twitter, check, flickr, check, and on and on). Then, FriendFeed live updates you and your friends with whatever network you've just updated. The other great thing about FF is its inclusion of more than the usual suspects — I have GoodReads, Pandora, even my Netflix queue added to my updates.
One caveat: to see your friends' updates, they have to join FriendFeed, but once you test it out and love it, you can sing them its praises.