"Users usually only have read access to their other networks. Social networks are not like news articles or blogs that you can just stick into an RSS reader, they require engagement and participation to become valuable to the user."
FindMeOn calls itself "A cure for multiple web personality disorder".
I can see not having Yet Another Profile, but, people have to browse to the aggregator page. It can not be found via interests or seen by browsing friends-of-friends. So far they've ended up being Yet Another Social Network to remember to log in to, and, wasn't that the very thing that was supposed to be cured?