I stumbled upon Channel Frederator through Lifehacker. Channel Frederator is an outlet for animators everywhere to let their cartoons be seen by the world, and they've just launched a vodcast on the iTMS. There's only one episode in the store so far, with more at the site. While I haven't had a chance to watch any yet, this looks like some great stuff. In addition to the iTMS, they also offer an RSS feed for episodes as well as good ol' fashioned download links.
I love it when people take back the power of the media like this. Rock on Channel Frederator!