[ame=http://www.youtube.com/watch?v=aT2VMum9wb0]‪Change Brightness On Springboard With SBBrightness For iPhone & iPod Touch - iOS Vlog 490‬‏ - YouTube[/ame]
SBBrightness is a similar tweak to SBVolume except it allows you to change your Brightness right on your Springboard. This adjust sliders shows up right above your dock without blocking too much. After installed, you can go to your Springboard, and just slide the slider to adjust the brightness. Simple tweak, great for those who need it, and best of all, its FREE!