Yes OpenID it does provide your email address. That's why my gravatar icon shows up wherever I login with OpenID. You don't need to type in a long URL to login

Yes OpenID it does provide your email address. That's why my gravatar icon shows up wherever I login with OpenID. You don't need to type in a long URL to login using OpenID. If you have a domain you can use it to delegate the OpenID provider to use for logins. So you need something like openid.mydomain.com and a username and login. One set of authentication information to remember instead of different ones for every website or application you use. You wouldn't want to use Webkit to implement OpenID on the iPhone anyway. You would want to integrate it into your application so that was a seamless process.