I have been playing around with a new tool called Personal Bee with my friend Nicholas Chim. This web-based application is a new kind of RSS aggregator that allows you to pool a set of feeds around a specific topic and "discover" trends within the articles. I have created a Bee for VoIP which I call VoIP Tracker. Let me know what you think!
The whole system is in a "prototype" stage at present, so expect it to evolve quickly!
UPDATE: Note that the UI was designed using AJAX so old versions of IE will not render the pages correctly. And your best experience will be while using Firefox...