We do not allow users to create their own accounts on the wiki, due to rampant spam account creation. Unfortunately, our wiki does not have similar functionality to our forums, which would allow us to review accounts before they're created. As such, we've turned off the ability for users to create their own accounts. In turn, you can request an account, and we will send you a user name and password.
To request an account, head to our General Contact Form, contact the Webmaster, and request a wiki account.