Podcast People

http://podcastpeople.com/

This website allows users to post audio and video podcasts to share. This is a free service, but would include ads. Paid accounts run from $8 (500 mb) to $30(2G) per month. The paid accounts do not have to include ads. I see this as having a more commercial use than for a school. One of their selling points is that you can use charge folks to view your creations.