A discussion group hosted at Yahoo (http://groups.yahoo.com) focused on the development of the Gnutella protocol. The file area contains several protocol specifications and RFCs, covering topics such as ultra-peers and web caches.
The official site is at groups.yahoo.com/group/the-gdf.
Competing factions may be found at Gnutella Forums Development Forum (http://www.gnutellaforums.com/forumdisplay.php?forumid=42) along with many Gnutella users.
TakeDown.NET -> “The-Gnutella-Developer-Forum”