Currently I play at pokerroom.com and they only allow me to play at 4 tables at a time. I want to start playing 8 at a time now. How can I do this?

Which sites let you play 8+ tables at a time? Does FullTilt let you do it?
Can I play at FT and PR at the same time?

I play on a Mac. Next week after my exams i'll be playing on 2 gorgeous 19 inch monitors - can't wait. 8 tabling should be a great experience!