I've been following the podcast world for almost three years. The podcast universe is a trifle more organized than the blogiverse, because it takes more effort to assemble a podcast item than a blog entry. There are incredibly casual podcasters, but at the other extreme, there are podcast people who are trying to get enough respect to monetize their casts.
Remarkably, those serious podcasters have caught up to the more traditional print media. Here's how things stand: podcasters are making little to $nothing$, while newspapers and magazines are losing hundreds of million$. Not bad, not bad.