Yahoo Pipes is a sweet tool..
I rigged one up to filter out comments written only by the authors on a few blogs.. this one gives me comments from robb wolf, kurt harris, brad pilon, mark sisson.. I dont really agree with much from brad pilon but for some reason I like reading his comments.
http://pipes.yahoo.com/gregdavisca/A...3hGEzsAm_vrsUA
Just thought I'd throw this out there. Can totally copy it and switch in your favorites.