It would be very nice to be able to add an arbitrary number of URIs as alternate feeds to the default RSS/Atom feeds, and even remove the default feeds from the header altogether.

My use case: having just begun using FeedBurner to track subscription numbers, I'd like to make the first feed available my FeedBurner feed. Since the meta tags for RSS and Atom feeds are pushed in via a helper method in application_helper, I've hacked around those defaults and inserted my own. It seems, however, that it would be very useful to have a free form text area box in which one could enter a URL per line that would be inserted before the default feeds, and check boxes to activate/deactivate the default feeds.

If I get a chance, I'll create a patch that does this in the next week or so.