Blastfeed – Select RSS, Sift RSS and Read RSS
http://www.BlastFeed.com/

Blastfeed is an on-line service that lets you aggregate, remix and filter RSS feeds. And Blastfeed can immediately notify you of any results of such filtering. Blastfeed will only collect items that match your criteria in each feed. The results will be amalgamated into a single file and sent to you by email, Instant Messaging or as a new RSS feed, when and where you want it. This has been added to Bots, Blogs and News Aggregators Presentation sources page. This has been added to the tools section of Research Resources Subject Tracer™ Information Blog/