How to get rid of the raw tomato smell from tomato sauce?
Do you use tomato paste in your sauce as well? Starting your sauce by cooking tomato paste down (by itself) will give the sauce a more "cooked" smell because the sugars in the paste will begin to caramelize.

This guy references the technique. I picked it up from Mario Batali, but I can't find a reference for it. http://forums.egullet.org/topic/140049-frying-tomato-paste/