Aggregating social networks?

Recently I seem to have been asked to join so many social network groups, you start to get a little confused to what is where, which contacts you have through which social groups and so on. What would be really nice is a way of aggregating information between social groups that relates to you. For instance, I am a founder of Mobile Monday London, so there are many aspects of that I want to keep up on, also I have been using LinkedIn for a few years, recently I have got into Upcoming, dragged into adding a profile on MySpace and the list goes on. So ... I have about 5 networks, potentially related that I have no direct way of aggregating. So, surely can we integrate these social sites together? I know the same people who are also on many of these sites and there is no link between them. If social networks are to be truly connected, then we need to remove the disconnect between these sites. Ideas anyone?