6 Ways to Filter Your RSS Feeds - ReadWriteWeb
Buzz Marketing for Technology
JUNE 27, 2008
ZapTXT is a keyword filter (of the in variety) that returns results via email, instant messenger, or mobile phone. I use netvibes personally. Now if you are re-syndicating this as a box on a website, you want those 5 awesome posts from feed 1 to stay there a while, but over a couple of hours they can all roll of the page.
270 
Let's personalize your content