I have a project hosted at unfuddle and I noticed the choice of signing in with OpenID. My wordpress url can be a key to login to another site. How cool is that!
Ater linking my OpenID to my Unfuddle account I logged in to Unfuddle. A confirmation step asked my if I was shure and if I wanted it to pass just once or allways. I first picked just once, but after subsequent logins I choose allways. Now I have one password less I need te remember. Note that you have to login to the site you use for OpenID first.