RSS searching

I tried out several of the RSS search engines and came away mostly dissatisfied. I was looking for whole blogs on subjects and mostly was getting linked to specific blog entries that had little to do with my interests. Changing the keywords around didn't help much. I found it much more effective to go to some favorite sites and subscribe from there. However, I did like Topix.net, and it's concentration on localities. It was easy to use to find items about Baltimore and Harford.