I find the RSS Feed very useful. One down side though is the title "newest nodes xml generator" isn't that intuitive. Would it be possible to provide an optional parameter to change this title or call it something like "PerlMonks.org - Newest nodes - <types>"?
Not strictly related but I thought I'd mention that there are also RSS feeds to perlmonks available at http://prlmnks.org/rsshttp://prlmnks.org/rss-feeds.html. You can subscribe to overview feeds such as 'new questions' or 'new meditations'.
You can also subscribe to feeds for individual nodes to see if they have any replies. For example this node could be watched using http://prlmnks.org/rss/458722.xml. This is useful as replies to replies do not cause you to recieve a message as they may not be a reply to a node you authored.
Useful information, it's probably worth putting it into the XML generators help page. Btw the 1st link http://prlmnks.org/rss comes back with error "403 Forbidden".