Found a few tricks I was not aware of in there and I am a pretty darn infomaniac myself already… one caveat:
During the process of analyzing these topic tracking tools, we discovered – to our surprise – that not many of these services output results as RSS. Some of the leading apps in this field require users to visit their service. With that in mind, here is our full list and analysis.
Stick with services that aggregates in a reader (like my favorite combo, Google Reader + NetNewsWire) for sanity.
A Frog in the Valley 