This forum has an incredible amount of spammers these days. Because of this, I'm disabling automatic registrations. For now, the forum is invitation-only!
Remember, this is only being done to keep out the spammers. Anyone who is already a member can invite other people, and I will invite anyone who asks. Just send an email to firstname.lastname@example.org with your request to join the forum, and I'll invite you as soon as I can.
I will continue to look into other long-term solutions for the spammer problem.