I have disabled the option to let anyone register on here.  I have gotten a few registrants who turned out to just be people who were trying to figure out ways around security and spam filters recently, and I don’t want to have to deal with someone new trying to get junk in here.
If you’d like to register, just shoot me an email with your desired username and I’ll respond probably within a day with a password for you.  You can change the password when you log in again.
You don’t have to be registered in order to leave comments, though.  So I’m not really losing any functionality on the site.  I just wish there weren’t so many people out there trying to abuse the system.