All, Salmon, a proposed open protocol for pushing commentary upstream, is using Atom as its default payload format. It's most likely going to use the following extensions:
1. Threading (http://www.ietf.org/rfc/rfc4685.txt) 2. Crossposting (draft at http://martin.atkins.me.uk/specs/atomcrosspost) 3. Tombstones ( http://ietfreport.isoc.org/idref/draft-snell-atompub-tombstones/) 4. PubSubHubbub (draft at http://pubsubhubbub.googlecode.com/svn/trunk/pubsubhubbub-core-0.2.html) as well as being compatible with/capable of being a transport for Activity Streams (draft at http://martin.atkins.me.uk/specs/activitystreams/atomactivity) See http://salmon-protocol.org/ for more details; there's a blog post with more context at http://www.abstractioneer.org/2009/10/salmon-protocol-introducing-salmon.html . Regards, John
