Podcast are now becoming the rage in the blogging community. They consist of media files which are distributed over the net using syndication feeds. Listeners can then play them back on their mobile devices and personal computers.
One advantage of podcasting is that listeners can download them and decide when and how to listen to them. In case you are interested, MyPodcast.com lets you record and also provides Free Podcast hosting.
Besides the fact that it's totally free, other advantages of hosting on MyPodcast.com is that they offer Unlimited Storage and Bandwidth.
Thinking of giving it a try too.