"Until now such diagrams while "on the go" required my laptop and Microsoft Visio.  Now, thanks to Matter and Motions, all I need is my Windows Mobile device."

Clinton Fitch has a very good review up of First Diagramming, which allows you to create simple diagrams of decision making processes, flow charts or conceptual diagrams all within your Windows Mobile device.

This looks like a very handy application. Check out the full review at:

Matter and Motions First Diagramming 1.3 at clintonfitch.com