Age of Empires DS
 

http://ds.ign.com/articles/687/687988p1.html

I still don't get how this works...
seen pictures...
I thought it would show what you are doing on the touch screen and move your guys with that...
then when you click on town centre on the top screen it will have options which you use the d-pad to sellect what you want... then the pen to place it down...