Well, I'm currently deployed to OIF and planned on dropping my deposit for a 2010 M3 in April of 2010. My contact at the dealership at my homestation (outside of Ansbach, Germany) just e-mailed me and told me the 2010 model will be unavailable at that time, and if I want to order a 2010 model I need to put down the deposit right now (which I am not ready to do yet).
This is in Germany so I'm certain it is different from the States, but just wanted to add my 2 cents...
'11 BMW E92 ///M3 - ZCP and DCT
'13 Toyota Tundra - 4x4 Platinum CrewMax, 5.7l iForce V8