Kevin's Bag-o-Tricks (http://wpf.netfx3.com/files/folders/controls/entry10297.aspx)
A collection of cool demos to show off some of the power of WPF.  Includes complete C# source code.


Seattle PI Reader (http://seattlepi.nwsource.com/newsreader/)
The WPF reader for the Seattle Post-Intelligencer


Zurich Airport (http://wpf.netfx3.com/direct/zurich/zeuswpf.xbap)
The Zurich Airport demo app.


Family Show (http://www.vertigo.com/familyshow.aspx)
The geneology/family history application.


Additional links to demos: http://robrelyea.com/events/teched2007