According to their site, the program supports the following RSS Search Engines: Yahoo, Moreover, News Knowledge, Syndic8, Newsmob, Sourceforge, YellowBrix, Genecast, Blogdex, Popdex, Blog Street, Blog Wise, Boing Boing, 2RSS, Blog Digger, Bloogz, Easy RSS, Edu RSS, Fyber Search, Memigo, News Trove, RSS Clipping, Feedster, Day Pop, Technorati, Postami, Pub Sub, Bulk Feeds, & Feeds Farm.
Might be worth checking out for people with tons of feeds. A trial version is available at their site.
