A few weeks ago I was at NRWConf at Wuppertal speaking about MVVM, WPF and Silverlight. I recorded the sample I showed there and posted it on YouTube (check out my blog post at http://www.timecockpit.com/en/blogs/10-09-10/time_cockpit_at_NRWConf.aspx). Due to popular demand you can now download the source code.