[Updated: 18-June-2006 to include support by Rawdog 2.9 aggregator]
This blog entry attempts to provide a catalog of systems that implement RFC3229 as described in my post on RFC3229+feed. I'm hoping that this will grow to be a very long list.
If we can get RFC3229 well and fully deployed in the blogging community, it is certain that we'll see quite a dramatic drop in the bandwidth requirements that result from polling for RSS and Atom files. While I'm convinced that eventually we'll have to leave the inefficiencies of polling behind and move syndication to a push model, in the meantime, we should be doing polling as well as we can.
Below, you'll find a list of servers and clients that support RFC3229.