I read quite a few RSS feeds, or at least try to. There's just too much and never enough time. So, what I would like to do is take a bunch of feeds, combine them, filter for certain words and output to one RSS feed. Seems like a very logical thing to do, but I have not found a solution I like yet.

Running this on one of my servers would be nice, but would also use some free service. Something like Yahoo Pipes would be ok, except for the horrible pipe building interface, and the fact that you can't easily label the source of each item in the feed.

Is anyone doing something like this and have suggestions?