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Crowdstatus is made up of twitter crowds, each crowd contains people and each twitter person in the crowd has a status. This means that you can see what everyones current status is in a crowd.
Iminta has a cool thing going for it: you can put your followers in groups and specify which group sees what... I really like the idea of variable resolution for social feeds. Still in beta as of 3/16/08
The challenge for Friendfeed and the like is that while I really like all my services gathered in one place, I would rather that these would be centralized on my blog instead of a third party service. Yes you can cross post or add badges, but it's not rea