Hi,
I made a simple example of Away3D + physics + shadows + mouse interaction:
http://www.appspouch.com/Away3DTest
Click the mouse to throw some balls.
Press the statistics to go full screen.
You will have to wait some time for the textures to be load in the first run.
Here is the source:
http://www.appspouch.com/Away3DTest/Away3DTest.zip
Have fun