I've been trying to get on there as well. Using YIM, I chatted with a number of men that have an account, and have asked them to post comments for me.
As near as I can figure, the last person to get a registration was texall88 in mid August of 2010.
I believe that the moderator must manually send out the registration e-mails and hasn't done so since mid August. Nobody seems to hear from him, and I wonder if it's possible that he's actually dead, and the board will just keep running until the bills stop getting paid.
It's a shame, because I think it's the best site there is to discuss ball pumping.