Stephen Downes has been running his Edu_RSS educational blog aggregation service for a while now. I've used Edu_RSS to build conference blogging aggregators (for Merlot 2003, and NMC 2004). He has now put together a page that spits out all posts related to podcasting. Since he's semi-selected the feeds to be somewhat educational in nature, this becomes a feed about podcasts in education. Very cool.