I use google reader. One feature I would like is filtered feeds. ( something on the lines of yahoo pipes. Unfortunately the feeds from yahoo pipes do not updat

I use google reader. One feature I would like is filtered feeds. ( something on the lines of yahoo pipes. Unfortunately the feeds from yahoo pipes do not update frequently enough and lot of items are missed. ). In essence if I want all the hacker news items which are only related to erlang, I wlll set up a filtered feed ( title or summary contains erlang ) and I will only get erlang items for that feed.