Setup WPMU signup page and membership subscription

Hey guys!

I just bought a WPMU setup though wp.mu and are having some issues.

There isn't any formular on my signup page? I've been using "membership" plugin (better than Pro Sites?)

My signup page:
http://bunobuno.com/kom-igang/

I'd like my setup so that new visiters can buy access and get their own website (not blog) and pay though paypal express subscription.