Right, that's what tripped me up as well. Registration just sends you back to the homepage. Login worked for me now as well.
Apologies; I'd intended to post this on HN after a few more bugs had been worked out, but I was beaten to it. I'll fix the lack of visual feedback shortly, although there's currently no email verification.
Sorry it's my fault! I found your submission on reddit and thought it deserved to be shared - it didn't come to my mind you'd rather submit here by yourself.