A few questions
1) On the wpmu website you can log in with either Google or Facebook. Is there a plug in available that does this? Is this the Ultimate Facebook app?
2) Can you "Log in with facebook" (or google) when purchasing a subscription from the membership plug in?
3) If you use the "Pay with Like" app and someone likes your site, does this count as a "like" towards your facebook page? Or is this different?
I am pretty unfamiliar with how Facebook likes work! Thanks for your help