We are looking at using an out-of-the-box CMS for www.gnome.org. These usually come with build-in feed display support. We'd rather not tweak that with custom hacks.
Maybe the CMS will be able to filter message according to tags ? So providing only one feed with tags (license, category, ...) may be fine. If the CMS doen'nt support such filters I may try to add it :)