RSS Feed for Only most-popular / hottest threads

[septimus]

Obligatory apology first: I can't seem to find a mod for this, but I often can't see things in front of my face.

I'm looking for a way to provide an RSS feed of vBulletin threads. Rather than the default RSS feed created from the External Data Provider, what I want is a feed of recently popular / active / hot threads. So instead of just the 10 feeds with the most recent posts, it would be the 10 feeds that are getting the most activity on a given day / hour / whatever.

The exact metric for what constitutes 'popular / active/ hot' isn't especially important, but the main idea is that if a thread is getting a lot of posts on a given day, I'd like that to be available in the feed.

Thanks in advance!