This subject has come up quite a bit during recent discussion and I also think an element of weapon sway should be part of ArmA II.
To this end, I've made a simple addon that simulates a level of weapon sway that can be overcome by skill of the shooter without becoming a distraction.
As mentioned in the readme, it is balanced in favour of gameplay due to the way weapon sway is simulated.
Just grab the following files:
ARMA II Zeu_Weaponsway_readme.txt
from the Yoma Addon Sync repository. The Auto config URL is:
Thanks to Inkompetent, Armaholic & ArmedAssault.info, download mirrors:
DOWNLOAD - Weapons Sway (v.1.0) - [8 KB] from ArmedAssault.info
Further instructions are included in the readme.
In the longer term, I hope BIS improve the animations and effects to more accurately portray this.
Feedback and mirrors appreciated.
Hopefully we can develop this to an accepted standard for the game.