I don't know when I was last on MySpace, possibly 2-3 months ago. I discover interesting things, like that I'm in my own extended network, which consists of more than 200000 people with no indication who those people are, opr how they are connected. .
I visit Facebook about once or twice a week. At first i liked it because it was less cluttered, but now it is getting filled with clutter and "apps", and it's impossible to keep up, so I don't even try.
Orkut by Google is a social networking site that seems less cluttered, but Google aren't promoting it, and you can't even find it on their menu any more.
I do visit my general blogs
Notes from underground and
Khanya every day to see if anyone has left comments, and update them every 2-3 days.