OpenID gives you a single username and password that allows you to log in to any OpenID-enabled site. It's genuinely a good thing and prevents you having to create yet another set of credentials.

Learn more at OpenId.net then get one for yourself.

If this is your first OpenID sign-in, you will automatically be assigned a username in the format unixmonkey%d. You're free to change this in your profile settings once you're signed in.