Yw. A lot of people are completely unaware of this feature. It comes in REALLY handy when your truck has been baking in the summer heat! The sad part is that this is a feature that your salesperson should have showed you when you took delivery but there's a good chance they didn't know about it either.
UPDATE-After speaking to a couple of instructors at school today, it appears that the upcoming 6.4 Hemi is only slated for the SRT-8 vehicles and not the trucks. The reson being that the 6.4, like the 6.1 is a HP and not a torque motor.
Interesting article. I said something to the instructor about a different cam profile that would put the torque curve in a lower rpm band and he said it was certainly possible. Everyone seems to be in agreement that the soonest we could see this motor is the 2011 model year.