I've just pushed a new version of the RXGK draft to the Internet Drafts repository. I believe that this draft addresses all of the comments I've received to date, and all of the issues raised at the Edinburgh Hackathon. Implementation is likely to start shortly - review would be greatly appreciated! The draft is available from : http://www.ietf.org/id/draft-wilkinson-afs3-rxgk-00.txt Thanks, Simon.