I've added into the head branch some quick preliminary stuff for supporting syndication feeds, adding an RSS option to Special:Newpages.
Access like so: http://....?title=Special:Newpages&feed=rss
It should be quite easily extendible to other QueryPage-based special pages (indeed, a change to QueryPage could probably make it available for every one of them), and to other similar feed formats such as Atom (subclass in Feed.php). These feeds at least for now don't include page text or anything, just titles, dates, edit comments, and links.
This replaces the old (and broken for a long time) rdf/recent.phtml... once it's working smoothly in all the places it's appropriate we'll also want handy visible links to the syndication feeds, of course.
-- brion vibber (brion @ pobox.com)