Saving this here for future reference if need be.
Due to spam bots pilfering the site, we've had to disable account creation, hopefully only for a little while!
In the meantime, if you need an account, either head to the official subreddit here and post requesting one, or to this thread on the official >G forums. Be sure to include your desired username and your email (if you want... it just makes it faster that way). You'll need to log in and change your password and make an edit within 24 hours or the system will automatically delete your account though.
Hopefully, with some of the other anti-spam measures we're putting up, we can remove this requirement in a little while.