I love OpenID and use it as much as possible. The only problem I have with it is the URL-as-username approach it takes. When a site asks me for the URL, I don't use OpenID as I always forget it. If the site asks me to "log in with Google using OpenID" or something similar I will use it. I don't see how people say that OpenID is a solution in search of a problem: I DO have the problem that I don't want to create a new account for every site I use. The problem is there, and some uses of OpenID really do solve it.