If the Atom rhetoric about openness and innovation is sincere, wouldn't you think there'd be an open source, public utility by now that, given an Atom feed, would supply you with an RSS equivalent? That way, if you wanted to offer a link to an RSS feed and your tools generated Atom, you could just write a link
and you'd have an RSS feed to. Sure, there'd be some impedance mismatch, but you could get Close Enough pretty easily.
Instead, we're going to have a format war and more food fights.