Registration is open for a short time. I suggest anyone who uses torrents a lot and doesn't have an account already takes advantage of this. It's possible to get invited but registration only opens around 3 or 4 times a year, so this is a great opportunity.
http://www.demonoid.com
Demonoid really isn't what it used to be. I feel bad for the owners. After that whole server thing that happened around a year ago, they just never really bounced back. It's still an ok site though.
I find sites like Piratebay and Mininova more useful nowadays tbh. Been using Demonoid for a while now and it does have some rare stuff, but it's pretty much just rare crap that you don't really need for anything. You could expect to find something like scans from the very first bible there but that's that :(