Here’s a list of big-time OpenID providers that are discoverable. This means you don’t need an exact URL, which is cool…
- Google: https://www.google.com/accounts/o8/id
- Yahoo: http://yahoo.com
- MySpace: http://myspace.com
- myOpenID: hhttp://myopenid.com
Additionally, if you have Google Apps, you can craft an OpenID URL like this:
https://www.google.com/accounts/o8/site-xrds?hd=example.com — Hmm, but it doesn’t seem to work… will update if I figure it out.