The homepage of the local Brighton New Media mailing list has had a facelift. It's now a very nifty aggregator of Brighton geek content.
This Ning competitor has a lot of really nice UI touches. Also, the fact that you can play around a lot without signing up is a plus point.
Plaxo to ship online identity aggregator based on microformats | ScobleShow: Videoblog about geeks, technology, and developers
The guys at Plaxo have not only implemented social network portability, they're sharing the code.
I saw afeeda demo'd at Reboot. It looks like a handy place to create a lifestream. Here's one I made earlier.
Marc Canter's been saying it for years: social networks for humans don't scale and lock-in is a no-no. I need to investigate People Aggregator.
An aggregator of aggregators... and I'm posting a link to it on one of the aggregators.