On improving the commentators feed

I've been subscribed to Ben Hammersley's commentators feed, and a couple things have come to mind that would improve it.

>> http://blog.mediacooperative.com/mt-comments.cgi?entry_id=3367

It'd be nice if the content of each person's article showed their three (five? ten?) most recent articles; I'd like to get a sample of the content that $random_person has on their blog, included as content with the entry for their blog itself.

This would, of course, require assigning RSS urls to each of the entries in the commentator database; blog authors could submit them as corrections, perhaps. Not sure how that would be managed.

RSS autodiscovery could be attempted on the given URLs, perhaps; GET and search for the tag (or whatever it's called these days), and if found, grab the linked content.

I've already subscribed to several blogs found through this commentator feed. Is this commentators thing available as an MT plugin?

Second, it'd be nice if I could instruct it to consider "http://www.crystalflame.net/*" all part of the same blog; right now I think I'm listed about three different times, thanks to my occasional habit of putting referrer-type information as GET parameters on my URLs (see this post for details). I'm not so sure how to implement that, though.