Anyone should be able to browse the forums and wiki pages. To do anything more than that you need to click on the signup link above. Signup asks you for a login name and an email address. A password will be generated and sent to that email address. Once you get it you should be able to login to the site by clicking the login link or by executing an action that requires you to be logged in. Once you are logged in other options appear. You can change your email address or pick a new password by clicking on the preferences link. If you ever forget your password, you can click on the forgot password button from the login screen. A new password will be generated and sent to you.
Also see TeensyWeb
-- Tyche