We recently finished the post product work required to get enhanced videos posted. The videos not only include slides\demos, but also include a separate video stream of the speaker so you get a deeper experience.
Mix08 Session Overview: Building Great AJAX Applications from Scratch Using ASP.NET 3.5 and Visual Studio 2008
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Unfortunately, this videos are not available for download, so you have to watch them on line..
Enjoy this and the rest of the sessions at http://sessions.visitmix.com/