I didn't see this tweak posted anywhere and searched but azharsunny over at XDA-Developers posted his itouch sensitivity cab.
http://forum.xda-developers.com/showthread.php?t=469865
He claims it increases the sensitivity of your screen. I am currently trying it out and it seems to have some improvement but it is not huge. Every little bit helps though..LOL
I have attached the cab for your convience.
HIT THE THANKS