Deafening silence. Microsoft Works. Compact Hummer. All oxymorons, yet making its debut in Detroit is the Hummer HX Concept, an off-road vehicle smaller than the H3, and designed to go head-to-head with the likes of the Jeep Wrangler. The HX boasts a 3.6-liter V-6 E85-ready flex-fuel engine mated to a six-speed automatic transmission and, of course, an off-road ready full-time four-wheel drive system with locking front and rear differentials. The 35-inch tall tires are mounted on custom bead-lock rims, and a complete underbody protection kit includes a front skid plate and drivetrain plates to protect the HX from the rigors of off-road duty.