Thanks to the blog of Mart Muller from Tam Tam a great example of something which you can do with SharePoint by combining existing products to one solution.

"Podcasting Kit for SharePoint (PKS) is an accelerator for social media, using Podcasting and social networkrs to deliver the next generation knowlegde management experience to Microsoft customers. Built on top of the Office SharePoint Server 2007 and Silverlight 2.0 platforms, PKS delivers an integrated experience with a wide variety of devices including PC, Zune, Windows Mobile phones and other podcast capable devices."
What Can You Do With Podcasting Kit for SharePoint (PKS)?:
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Listen and watch audio/video podcasts, anywhere on your PC or mobile device (Zune, SmartPhone, or any podcasting device)
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Share content by producing your own audio/video podcasts and publish them on PKS on your own.
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Connect and engage with podcasters via your integrated instant messaging program
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Find the most relevant content using the five star rating system, tag cloud, search engine and provide your feedback via comments.
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Get automatic podcast updates by subscribing to RSS feeds fully compatible with Zune and other podcasting devices
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Simple RSS feed based on a defined podcast series
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Simple RSS feed based on a person
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Dynamic RSS feed based on search results
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Play podcasts in real-time using Microsoft® Silverlight™ and progressive playback
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Retrieve instant ROI and metrics with the ability to track the number of podcasts downloaded and/or viewed, instant feedback via rating system and comments, and subscribers via the RSS feed
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Access the richness of SharePoint to extend the solution: workflows, community sub-sites, access rights, editorial and more
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Customize your own PKS User Experience
