OpenID Attribute Exchange

With Drupal core OpenID module, users can authenticate on your Drupal  
site with
OpenID. With the OpenID extensions AX and SReg it is also possible to  
exchange
with user profile data. Alex Barth, Darren Ferguson and I have worked  
in the
past months together to improve the existing OpenID AX / SREG modules:

I propose to implement/integrate OpenID Attribute Exchange with Drupal. OpenID Attribute Exchange is a service extension for OpenID. OpenID Attribute Exchange allows identity information exchange between endpoints, i.e, it allows or rather is a way of transferring information about the user between the OpenID provider and relying party . Using the OpenID Attribute Exchange, identity information can be stored and retrieved using fetch and store messages respectively.