I really do think so. I think he probably is hesitant because he expects it to be as lame as myspace, but I have a feeling he would enjoy it, if only for all the neat little applications.
So, Que, give it a shot. We can do a lot of game related stuff on it, including tons of board games etc. We can play chess against each other quite easily as well. Yes, a lot of the applications are related to social networking, but they can be easily avoided. Plus the whole thing is extremely modifiable so that you will never be notified for annoying social crap if you don't want to.
Do join, and bring Sirean with you.