Once again, Ged Meads work on WPF catches my eye. A big thanks to Ged, Young Joo and Evan Lim for converting the C# samples over to Visual Basic for Petzolds book on WPF (Only 3 left in stock at Amazon UK - lets get those sold as well - but be warned, the style/approach of this book may not appeal to everyone).
You can find the samples for all 31 chapters on the MSDN Code Gallery at http://code.msdn.microsoft.com/petzoldsamplevb. This was a great initiative - I would love to know of any more examples.
P.S. Lets see if we can drive the downloads up - 1320 as of 17th July 2008 :-)