Kristian i wont be rude but its pretty damm hard to undo about 15 years of muscle memory where you keep trying to push down for up and vise versa. Personally I cant play Arma 2 till there is an invert for the controller. Also I know what your saying "why doesn't this (whatever name you decide to call me) just use the keyborad and mouse". I have a physical disability that prevents me from sitting up for long hours. So a controller is best for me.
To any andinistrator who may read this. A controller Y-axis invert would be cool!
PEACE!