Podpress is a handy plugin that turns any WordPress installation into a great platform to host and distribute audio lecturecasts. It has an incredible array of features. With it, you can distribute your audio lecturecasts on your WordPress blog (complete with a fully featured and incredibly configurable media player). It can also generate the necessary RSS feed to list your audio lecturecasts on iTunes (and allow you to exert complete control over how they will look on iTunes). One of the other great added features is that Podpress allows you to visualise (via an array of cool graphs) download statistics of each lecturecast. All in all, Podpress is pretty much the only solution you'll ever need if you want to distribute audio lecturecasts (as long as you are doing so from a WordPress site, that is).
(taken from http://chronicle.com/blogPost/5-Lecturecasting-Tools-That-I/25722/)