I've been experimenting with directed server side aggregators to present the concept to a potential client. The basic goal is to provide something like EduRSS or the new EDUCAUSE blog aggregations for members of a department or faculty (or combinations thereof).
Feed on Feeds looks like a pretty lightweight and functional option. I'm running a test of it now, with a few of the Learning Commons weblogs (and those of the other Amigos so there's something for the aggregator to chew on).
It's set to update all feeds on the hour. I'll look at customizing the look via css when I get a chance.