I just figured out how to make my site have the neat [RSS] box that Firefox displays to indicate your site has an RSS feed available.
It’s actually very simple: you just have to go to the Administrator screen. There, in Modules, select Syndicate. In Syndicate, look to the right and click on Parameters.
Where it says text, I entered:
Replace your own title and href (actually, just the server and leading URL part of the href), and you are ready to go!