I think this brings the “large” (I define large as >100,000 users) OpenID supporters to 4:
- SixApart (LiveJournal, Vox, etc)
- AOL (AIM, specifically, so far)
- SmugMug (only providing, consuming soon)
Microsoft, digg, and 37signals have all announced support, so there are certainly some other heavyweights on the horizon. It’s going to be fascinating to see what happens once critical mass is reached.
OpenID is going to cause some problems, I think, but hopefully it’ll solve more than it creates. The important thing, though, is that there’s momentum in the right direction, the right players are getting involved, and smarter people than I are thinking about the problem.