Yeah, OpenID is great! I hope it gets accepted widely quickly so I can safely forget my passwords ;)

One company that is leading the way is definately 37signals. Check out their OpenID information site at: http://www.37signals.com/openid

Especially the possibility to use your own web site as your id is a great idea. For example my website address is based on my name (jarkkolaine.com) so it makes a lot of sense to use that as my user name all around the web as well.