Podcast Research takes the form of a blog and podcast that examines the podcasting phenomena and studies it with an academic eye. There are various themes the study is interested in such as whether it can be considered a serious medium as blogging has become, and whether commercialization (like it or not) has to happen before it can reach critical mass.
Also, Podcasting avenue has lots of good info about, hm, well, i’m tired of the word already.