[OpenID] Outsourcing headers - XRD(S), CSS?

[SitG Admin]

Not all sites allow users to fully customize their headers on the 
Profile page, but some do allow the user to specify other external 
files (such as CSS), containing expected data. This would be an 
awkward compatibility hack (and I'm not sure how many sites it would 
even help with), but what do you all think of an extension to the 
Discovery process allowing RP's to check other external files for 
comments containing OpenID declarations?

-Shade