UPDATE: Plaxo DO support delegation, just not XRDS. It seems a WP database problem caused some of my OpenID delegation plug-in to mess up settings the wrong openid.server and openid.delegate values.
It should have been http://www.myopenid.com/server for openid.server and http://eran.myopenid.com for openid.delegate. The problem was due to the fact that XRDS is yet to be supported in Plaxo. I didn’t notice the problem with the configuration of openid.server and openid.delegate due to the fact that the XRDS settings was correctly configured and all of the sites that I use OpenID with do support XRDS.
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Plaxo is a real cool tool to synchronize your calendar and address book. Their new v3.0 (still in preview/beta mode) is really really cool and can sync from everything to everything.
They just announced that they now support OpenID as a relaying party so you can sign up for Plaxo using an existing OpenID or attach OpenID identities (yes, in plural) to your Plaxo account.
I already had a Plaxo account so I wanted to attach my existing OpenID to it. My OpenID is actually delegated from this blog to MyOpenID (my OpenID provider) using the OpenID Delegation plugin. It seems as though the Plaxo implementation lacks support for delegation.
Too bad, delegation is one of the stronger features OpenID has.
Plaxo, please support OpenID delegation. Without delegation it’s not a complete OpenID solution (at least I think so).