OpenID is dead. It was flawed from the beginning, they botched the deployment, and it's useless outside of the you-sitting-in-front-of-browser context. Mobile apps, delegating access, exchanging profile data... not supported.
The only thing that works well for lots of people is Facebook, twitter and google login. Mozilla's browserID might change things, but I'm neither holding my breath or expecting it to work well anytime soon. This is Mozilla after all.
