well i have seen so many d tha. basicly all big network site have a kind of tube site setup. i have also one that has a tube site feeling only much cleaner and is a normal paysite, only much more dinamic. but i do offer 3 minutes of every movie we have. ours is still in the making. but i can tell its not easy at all. much more complex than a normal paysite. took us about 8 months to make it, test it perfect it. We use ccbill but again it can be tricky. Take a good programmer a cms and start from there.
brazzers has a tube kind of style
http://www.brazzers.com/tour3/?actio...esc&site_id=78