PeopleBrowsr (I would have called it PeepBrowsr) is an online app that lets you keep tabs on your online IDs.  Kinda like TweetDeck as an online application, but in addition to Twitter, you can keep track of your other online identities.  If you have used TweetDeck you will get PeopleBrowsr immediately.  Although it’s in Alpha, PB seems stable and very useful.  Using PB you can update your networks, follow your friends, organize your favorites and search across Twitter, flickr, YouTube, LinkedIn, Digg, Seesmic, Identi.ca, Photobucket, upcoming and FriendFeed.

As an example of using it with Twitter, just go to PeopleBrowsr.com, click on More >