Uh, oh. Here come the venture capitalists.
Social Software == Internet Hype 2.0?!!
Discuss.
An observation though. All of the software being discussed only makes minimal use of the lessons of social network and computing research. Friendster strikes me as a triumph of marketing and cultural fascination than being revolutionary from a technological or sociological standpoint.
Then again, Tim Berners-Lee didn't know much about hypertext either.