Apparently some mail servers are grabbing the registration confirmation e-mails sent out by the blog and grinding them into dust.
If you registered and did not get an e-mail containing your username and system-generated password, let me know. Your user has been created, you just didn’t get your confirmation e-mail. I’ll reset your password, send that new password to you, and you can then log on and change it to whatever you like.
Sorry for the rigamarole.
UPDATE: Thanks to Kevin and my cool OS X book, I have a line on fixing the e-mail registration problem. I’ll get it implemented just as soon as I can. Until then, you can e-mail me directly if you’d like an account on the blog, and I’ll set it up for you.