Seems Atom is popping up everywhere in my world at the moment, after a bit of a quiet period.
Chris J. Davis announced his plans to create an AtomPub client for iPhone. I had a discussion with Rick Cockrum about AtomPub and the metaweblog API, on his blog, which was raised again on the Habari developers list. And then Habari trunk was merged into the AtomPub development branch, because no-one has had a chance to do any work there recently. Well, no-one being me, and I got a poke from freakerz. Better start working on some of those AtomPub tickets.