You know about OpenID right? Simon Menke wrote a plugin for delegating in mephisto. However, on my installation it didn’t quite work so I hardcoded like another Simon says .
You pretty much insert into head the following (with your own data of course)
<link rel="openid.server" href="http://www.myopenid.com/server">
<link rel="openid.delegate" href="http://spyros.myopenid.com/">
See also, OpenID on Rails.
