Mystery prizes are good, too! Maybe adding "mystery" in the copy somewhere would help clarify that. Or change "prize" to "surprise." In any case, it seems like a neat idea and it's well-executed for a 1-day project.

I just ended up on your sweet website and now I'm purchasing too much candy. What have you done? :-( This interactive pick n mixer is way too much fun.

Consider this a second request ;) I don't have neither accounts, but would really like to register; it seems very interesting.

Fourth request. Seems like a cool idea, but not cool enough for me to have to create an account on either of those two services.

I'll make the third request in a comment since you can't see the upvotes.

And a fourth

I would like regular registration too. I signed up with a test Facebook account I use at work - not preferable.

In for vanilla registration. I don't have either of the two services you allow.

+1 for independent registration