OpenID provider vs relying party

[This reply is a bit late coming, sorry]

OpenID doesn't forbid you from attaching some site-specific conditions to usage. I see that
the CLA process requires contributors to give you a telephone contact number and a home or
work address. You could easily also ask them to provide an OpenID at this point.

If someone signs into the site using an OpenID that doesn't have a CLA on file, you can send
them to information about joining Fedora. For existing members you can add an account page
which lets them add or remove an OpenID on their account, in the same way that they can
currently change their contact details or password.

If the CLA is taken very seriously (do you follow-up and check that every telephone number is
valid and contacts the person who filled out the form? that every address given is a
residential or office address and that the person lives or works there?) then you might want
to Whitelist OpenID providers based on their authentication policies, but in any case there is
no legal blocker to being a relying party. I hope you can make it happen.