We had a nice little spam attack earlier today. Thank you all who alerted me, and helped delete the spam messages! There were quite a few new "registrations" that I agonized over, worried that I might be deleting legitimate new Members.
Many other sites have been hit as well, and new Member registration will be turned off until we understand the attack, and how to defend against it.
My apologies for any inconvenience!
Registrations are open again. Sorry for any inconvenience.