Reviews social networking site aggregators (profile aggregators): Spokeo, Hypeit, Profilefly, ProfileLinker, and Profilactic. Commenters discuss portals: Netvibes, Pageflakes, iGoogle...and lifestreaming, social streaming, or streaming presence sites li
juhu is a small mac os x application (10.4+) aimed to be a client for the jaiku web service. looks pretty promising but for now I'll stick with twitku.
I surfed over to Jaiku.com annd spent a few seconds looking at the big map on their homepage, the one that looks like Twittervision, in which new messages show up on the globe as they're posted.