The second revision of the intial entries for HTTP in the Message Header Registries [1] are now available as an Internet-Draft [2]. Please have a look over them to assure their correctness and completeness.
Note that entries haven't been included for I-Ds on the standards track; as they are published, they'll need to include registration templates for any new headers.
Regards,
1. http://www.ietf.org/internet-drafts/draft-klyne-msghdr-registry-07.txt
2. http://www.ietf.org/internet-drafts/draft-nottingham-hdrreg-http-01.txt
-- Mark Nottingham http://www.mnot.net/
