I have thought about this subject as well, but from what I have seen the majority of MySpace users seem to be in the 14-18 age range, which I am not after. I suppose if your site targeted younger people or had discussion which that particular group enjoys, it might be a good idea. For myself, I can't stand MySpace - it's original intent was good, which is giving musicians a place to spread the word about their band but now it's turned into something completely different.