I found this cool multi touch library for WPF(http://www.codeplex.com/MultiTouchVista). Check out how simple is it to create a photoboard.

Download code from here

– Attach two mice to your computer
– Copy some pictures to your “My Pictures” folder
– Execute WpfApplication1\WpfApplication1\bin\Debug\WpfApplication1.exe
– Please close the multi-touch service(opens as console app) after this.

Note: You need .NET framework 3.5 installed.