I really like the concept! However I think your landing page could use some work. The call to action (Registering) isn't as clear as it could be. What I would do is add a big button 'register' and ask the user to pick a way to register after that. At first glance the facebook logo could just be a link to your facebook page or something. Also you need some way to lure people in, some screenshots, a short video. I want…
. . . and have added a green login/register button that clicks open a modal window with login options to address your first comment. Thanks for this! After you stare at something long enough (as I have) a fresh set of eyes really awesome.