Ha. Well, even though this mimics real social groups much more closely than social networking v1.0, I don't think the issue had become readily apparent until re

Ha. Well, even though this mimics real social groups much more closely than social networking v1.0, I don't think the issue had become readily apparent until recently (as evidenced by the number of products that have appeared in the past 3-6 months including Groupme (betaworks), CollegeOnly (funded by Peter Thiel), Google Me, Frid.ge (YC '10), Diaspora, etc.)