I am always needing to adjust my brightness. BrightnessiCons offers users control of brightness using volume control buttons. This tweak requires a jailbroken device. If you need to know how to jailbreak your device running iOS 5.1.1 please watch the video here.
This tweak was one that was well needed. I for one can definitely get some use from this tweak. Give it atry today for Free in BigBoss repo.