If you are interested in Identity online (and I believe that this is the next big area of the net is identity management across platforms), ClaimID is now off beta, and available for signup. Check out Fred’s announcement for info on the launch.
I’ve been using ClaimID for some time now while it was in beta, and the development team has done an amazing job integrating information issues/needs into the tool. Take a look, play with it, and see if it does what you need.