OpenID is a great concept in the world of social networking. I think certain ClearspaceX installations would benefit greatly from the use of OpenID authentication. Imagine a world where MySpace, Facebook, Livejournal (and other big names you can think of) can all log into eachother's services. Add ClearspaceX to that mix and you start to break down the barriers between communities.
Yes! Since we have different platforms internally (clearspace, basecamp, and alfresco) we have decided to do openid for all of them. It would be nice if you guys decided to do this - but I am going to start hacking away and put this in immediately. I will send the code along when I am done.
I think supporting OpenID is very important and should be implemented similar to the LDAP support so the server admin can decide what OpenID servers to take authentication from.