Has there been discussion around how to resolve equivalent openids? Meaning, I personally have 8 openid providers and the number is sure to grow. Have you discussed a way to make them equivalent during authentication?
I put together a solution based on the rel="me" link graph. Agree or disagree?
How about adding the following to the home page on your domain, and using your domain as your OpenID?
<link rel="openid.server" href="..." />
<link rel="openid.delegate" href="..." />
<link rel="openid2.local_id" href="..." />
<link rel="openid2.provider" href="..." />
Then when you want to change provider, you just update the information here.
An OpenID Identifier merely allows you to prove you own some identifier (typically a URL). If you control many URLs, it only makes sense to activate as many of them as OpenID Identifiers as you want to maintain distinct identities for.
So no, I'd be against this rel="me" approach. Besides the fact that HTML discovery is about to be deprecated in OpenID anyway since it's difficult to make secure and resilient against the many forms of HTML there are.