Dennis earlier was responsible for collating the code from us for the book, and he just informed us it is available online! Sweet! You can get the code from here and have a play. You will of course need .NET 3.0 RTM and preferably Visual Studio 2005.
It is good to see some reviews starting to come along, if you have any questions feel free to ping any of us and also let us know if you find any issues with the code - or the book if you need some help.