I didn't think much of it, but after using it for a week, I wish it was used everywhere. To those of you who haven't used it, try it out before condemning it. It's really nice to login with the click of a button (no typing usernames and passwords) and signing up is usually a one click action as well.
What's the best way to start for someone who doesn't want their entire internet identity tied with up Yahoo, Google, or Facebook?
Or you can host your own.
See here for a good list: http://openid.net/get-an-openid/
I initially wasn't too impressed by OpenID, but I was sold by the third site I got to use my login. It's value is really tied to the adoption by sites.
It's especially nice on small blogs: you don't have post anonymously if you are averse to signups.