I finally succumbed & opened a myspace account. Seriously considering facebook, too. Not really sure why, other than that I'd like to explore those communities. OK, myspace has a really active music community, and I'm hoping that I'll be able to make some good connections there, with interesting people. Not sure about facebook, but since it's largely linked with education communities should also have some interesting people.
blogspot is just fine, and LJ isn't too bad either. It's not like I've got all the time in the world to keep up with a lot of communities. I guess I'll just have to see how it goes.