You provide the connection to twitter/facebook, but users really won't do that until they want to -- until they have a reason to. Let them save something or cre

You provide the connection to twitter/facebook, but users really won't do that until they want to -- until they have a reason to. Let them save something or create something on your site, interact with it somehow, and then to have it the same when they come back later, they have to register. Your homepage right now just consists of buttons to sign up and buttons to register. There's no "Try it now" and there should be.