TruVativ's Stylo T40 Flatbar is made from butted 7050 aluminum for low weight and excellent strength. Plus, the flat profile of the bar puts you in an aggressive position perfect for short-travel bikes and it's bar-end compatible, too.
Also available in Snow White (image unavailable from manufacturer).
Clamp diameter: 31.8mm
Sweep: 10 degrees
Weight: 270 grams