We put the login with Facebook as the only option because we use the information about movies the user liked to provide better customized results. We realized that this was potentially going to lose us some users, and we kind of put it here on HN as a test, to see if somebody was going to complain.
Anyway, we are going to have a "normal" registration/login feature very soon and both options are going to be available.
You can't do a demo without trying to slurp up my social network?