I don't think I ever had a MySpace. It didn't catch on at school or anything and everyone I wanted to talk to had Livejournal anyway.
I've never really had a real separator between online friends and offline friends before. I have more online friends on Facebook than IRL people and generally any kind of social media site I've visited in the past, I've kept the same profile for both online and offline friends because I'm too lazy to segregate. I don't know a whole lot of other people who do this... usually people have very clean lines between their friends from school/life and the people they meet exclusively online. :x