This site is now an OpenID enabled site. What this means is that in order to post comments, download files, create forum posts etc. a login is still required but that is achieved through your OpenID account. This also bypasses the email registration process as you are instantly verified with your OpenID.

For further information here is your starting point.

For user's that have already created accounts and want to login with their OpenID it will be easier to login as per normal and edit your account details. There is now an OpenID tab, simply enter your OpenID. Next time logging in, just use your OpenID.