People from the web keep telling me, that C# WPF isn't suited for making games. So I guess we really have a new use of engine here. :)
Yeah, I'm going to have to follow someone who uses a windows application to do something it wasn't intended to do. That's just genius. Hope your project is a success and I'd like to try it out.
If you want, there are a free demo and a cheap alpha already available.