Share 'How do you manage multiple social networks?'

Went on a connecting spree recently and joined up with about a dozen different social networking groups (it was easy, and seemed like a good idea at the time). Now I'm trying to figure out how to most effectively manage my participation at all these sites. (I'm asking this question in a multitude of forums as well) Seems like there should be an aggregator of some kind to simplify this. In real l…