Last week, I gave a presentation at the Madison .NET User Group on an introduction to the up-and-coming Model-View-View Model (MVVM) pattern for WPF.
In the presentation, we made a very simple application that used the MVVM pattern. I’ve posted the source code to this quick and dirty app here. Note: this app takes several shortcuts and shouldn’t be used as an example of best practices, but we did build it in about 30 minutes. 
You can also download my PowerPoint slide deck from that night. If you are just getting started, you will definitely find these online resources to be valuable:
- Karl Shifflett’s blog covering MVVM
- Josh Smith’s MVVM article in the February issue of MSDN Magazine
- Jaime Rodriguez’s MVVM Training Day info
In the presentation I was mentioning the use of Karl Shifflett’s XAML Power Toys. You can get that at http://karlshifflett.wordpress.com/xaml-power-toys/. If you are building business forms, it really is a time saver.
Let me know if you have any questions.
