Jabber/XMPP already has something similar, XEP-0070: http://www.xmpp.org/extensions/xep-0070.html http://www.xmpp.org/extensions/xep-0070.html (and there's an o

Jabber/XMPP already has something similar, XEP-0070: http://www.xmpp.org/extensions/xep-0070.html http://www.xmpp.org/extensions/xep-0070.html (and there's an openid gateway at http://openid.xmpp.za.net/ http://openid.xmpp.za.net/) I think doing this sort of thing over IM makes much more sense than email.