This American Life, a fantastic radio show on NPR, reports that it costs $150k a year in bandwidth charges to deliver their show as a podcast on iTunes. A solution is to use the Bittorrent protocol to spread the load across lots of nodes, thus reducing the bandwidth load on the show. Sadly iTunes doesn’t support it, but there is a web proxy tool that can fake it called iTorrent. I think it was abandoned and then someone else cleaned it up a bit. If NPR could convince their audience to start using something like this tool, it would reduce their costs. And I’m sure there are many other podcasters that would like to reduce their bandwidth costs. So if you’re looking for something to do, here’s an open problem that needs some work.