Planet Movable Type
Planet MT aggregates posts from the most important Movable Type weblogs and presents them in a variety of formats from headlines to full posts and RSS. The script is set to rebuild the files every half hour so posts may not show up instantly. There is a timestamp on the front page that shows last rebuild. I've had this idea swimming around my head ever since Planet Mozilla launched but never implemented it because until a few weeks ago I was under the impression that my host did not provide Python.