>> On a side note I just got through thrashing a few of the IMPP
participants
> who were starting to suggest using HTTP as a transport layer .. ( to
> circumvent firewalls ). A reminder of the IPP experience in this area
> silenced them pretty quickly :-)
>
Interestingly, Microsoft's old presence and notification proposal,
Rendezvous Protocol (RVP), uses HTTP as a substrate.
http://www.ietf.org/internet-drafts/draft-calsyn-rvp-01.txt