The feature where you enter a site URL and FR auto-discovers all RSS feeds is nice.
But sometimes sites add new RSS feeds. Could you add a feature in FR to detect new feeds from a site without having to explicitly enter the site name and check it. FR would remember all sites previously checked, and periodically (say once a week) check in the background if new RSS feeds have been added since last check.
Some kind of alert would be nice:
"Info: site www.whateversite.com has added (2) new feeds: Sports, Business"