WPF Boing demo needs life support

Question

Remember the Amiga boing demo? I was reading a 25th anniversary of the Amiga article and they mentioned it. Brought back some memories. I remember a WPF (called Avalon at the time) demo put together to mimic it. I did some googling and found it here. However, it seems to be extremely out-of-date as the XAML markup and the code-behind is rife with errors when I attempt to build in VS 2010 (re-targeted to CLR 4.0 Client Profile). Are there any WPF gurus out there who are able and willing to bring it into this decade? This would go a long way to understanding the WPF/XAML stack for me. Thanks!

Edit: I'm using the slightly updated version I just found here.

Edit the 2nd: I've gotten it to compile and show the nice gradient blue background, but not the bouncing checkered ball. The problem is that I cannot find the modern equivalent of:

        <x:Include x:Content="{ball}" />

Answer 1

I have recreated this stuff for .NET 4.0. Solution is available by Boing link. Thanks for your suggestion. It was interesting!

Added

I have added solution code to codepaste.net. You can view it here.