Creative Commons' wiki is now an OpenID enabled-site. Don't hesitate - if you don't have one yet - to create an OpenID account. There are severals OpenID providers so merely choose one from the list below :

• MyOpenID
• VIdentity
• GetOpenID
• TypeKey
• MyLID
• VeriSign Personnal Identity Provider

A really nice screencast by Don McAllister explaining how to use OpenID can be viewed here.

Edit: Another screencast from Simon Willison