It's probably because I'm a bit dense when trying to create documents that are "standards compliant" that I've been struggling somewhat with converting my syndication feed over to the new Atom 1.0 format. I read where other people managed it in 5 minutes, and feel like a total failure for having spent over an hour on it.
While I am not quite certain if my feed is optimal (e.g., I am confused as to the "id" tag, as different people interpret its use in different ways), it does verify as Atom 1.0 compliant. Perhaps tweaks will come later once I've seen the "official" template when Movable Type 3.2 is released. In the meanwhile, I've killed off all of my RSS variants, and have routed their URLs to the Atom feed instead. Hopefully this won't cause problems for anybody.
The next step is trying to figure out how to craft a "comments only" feed in Atom format. That will replace the "combined entries/comments" feed, since that one seems to confuse many newsreaders out there.
I remain optimistic that Atom catches on in a big way so that the "syndication wars" will finally end.
NOTE TO MAC USERS: If you are using NetNewsWire to read your syndication feeds, you'll need to upgrade to version 2.0.1 in order to view Atom 1.0 feeds. It's free to registered users. I believe that other readers (like Shrook) are also being updated.