Today I was curious about doing OpenID delegation. I wanted to use my blog (coderich.net) as my OpenID and have it authenticate via another provider. I ended up choosing Google as the other provider, but Launchpad would’ve worked just as well for me, I think.
I found a helpful stackoverflow answer that explained how to Delegate OpenID to Google. Then, I found an OpenID Delegate Plugin for WordPress. It didn’t use the openid2 link names, so I updated the plugin slightly so it provides both the old tags and the new ones; you can download my version 0.2.