Use search key hold or status bar shortcuts to activate an invisible overlay above any application. Then simply swipe anywhere to adjust the brightness quickly. Done! Preferences include other options like a tilt mode so....
Check it out!
PRO: https://market.android.com/details?id=com.DanGirshovich.T4B
FREE: https://market.android.com/details?id=com.DanGirshovich.T4BF
Check it out!
PRO: https://market.android.com/details?id=com.DanGirshovich.T4B
FREE: https://market.android.com/details?id=com.DanGirshovich.T4BF