I'm about to slit someone's throat, I managed to register, but now I can't sign in, and when I DO get to the sign in page and attempt to sign it, I get a blank page after I click sign in.
The only way I know to sign back in right now is to delete your cookies, then go to the "register now" page again. If you do that, then navigate back to the site, you'll be signed in. Of course, if I try to go to "My Rewards" or anything it just times out, but at least you can see the "I'm Finished" button highlighted to know that you're in the contest. I'm not ready to hit that button yet, so I don't know if it would work. It'll probably take me like three weeks to get the points and I'm pretty sure that all the prizes will be gone, but I signed up just in case they have enough prizes to cover me.