This blog has traditionally (i.e., MT 2.x gave me) two RSS feeds, 0.91 (as index.xml) and 1.0 (as index.rdf).
MT3 provides templates for RSS 2.0 and for Atom syndication.
Now, it seems goofy as all heck to have four different syndication feeds. So I poked around, and found this history of RSS formats (not even counting Atom). There are seven different formats out there right now, with varying histories and owners (and not necessarily in numeric sequence). Yeesh. Another look here.
I have no basis for judging which one is best, which one more RSS readers will handle, etc. So … heck with it. It’s a trivial thing to write the actual feed, upon contemplation. So I’ll now include an Atom feed (atom.xml) and an RSS 2.0 feed (index.rss). And if performance goes in the crapper, or someone sees some horrible error I’m making, I’m sure folks will let me know …