I have Google Wave, Yelp, and MySpace, too, I just don't really actively use them.

Yelp is for finding places to eat, and really that's all. I was unaware that it had any real networking features other than the ability to define friends.

MySpace is for keeping up with folks who I can't convince to sign on for Facebook yet, and will eventually be happily phased out.

Google Wave... really wtf is it for?