I have experimented with Google Blog Search, Topix.net, Sundic*.com and Technorati and found an immense amount of information. Information overload, actually. RSS feeds are a good way to keep up on current information, but a person needs to be selective in what information they really have time to read.
The Google Blog Search seemed easiest for me to use.
I added some feeds to my list, but I think I need more time to research feeds for specific topics of interest than I have here at work.
However, I look forward to reading the feeds that I have added.