... announcing the Podcasting Kit for SharePoint (PKS), available as an open source project at http://www.CodePlex.com/PKS. The PKS is an accelerator for social media, using podcasting and social networks to deliver the next generation knowledge management solution. Built on top of SharePoint Server 2007 and using Silverlight 2, the PKS delivers an integrated experience with a wide variety of devices including iPod, Zune, Windows Mobile phones, and other podcast capable devices. The PKS follows the same model and approach to open source community contributions and support as the Community Kit for SharePoint.
Source : blogs.msdn.com/sharepoint