babySmash is a WPF app written by one of the worlds most highly respected blogger/geek/Microsoft shills to showcase the Microsoft interactive design and development stack and to entertain his apparently already tech-savvy spawn.
Hanselman bigging up blackspike
While he put together an amazing app, he points out that developer != designer, and asked for a little design help. I hastily drew a few simple characters and skinned the controls in Blend and sent him some XAML back, and he’s used it in his presentations to developers all over the world, and for .net Microsoft sites.
You can view the whole video here: http://channel9.msdn.com/pdc2008/TL49/