This probably has been obvious for many web architects but I am now guessing that the MSDNTV archive links to one page (espisode.aspx) that then loads thousands (or millions) of little XML files (manifests?) with the same schema.

This means that InfoPath users can create and edit these XML manifest files and save them to a location where the web site code finds them. This is a quick and dirty static publishing model that works perfectly for small business people who already have Microsoft office with InfoPath—dropping SharePoint into the mix can’t hurt (too much) as well.