As of today I have vailed for the power of social networking by subscribing to twitter: http://twitter.com/Arnoud_
Facebook had me earlier; but I predict that in the end, there will be only ONE.
The choice is up to you really: Twitter; Facebook; Linkedin; Hyves; Plaxo; Google Wave...
No, I think we will grow tired of all those fancy webnames in five years or so and come to the conclusion that individuality should not be channeled through lemming-like concepts. Follow me?