Despite its relationship to the Halo Warthog, the Hummer HX made a pretty big splash at the Detroit Auto Show. One of its coolest features is the front-facing camera that's integrated into the rear-view mirror. Throw in a docking slot to record your off-roading adventures directly to an iPod and you've got something quite cool, indeed. Sure, the HX is obviously very conceptual, but this is a feature that doesn't seem too farfetched. Of course, it's also a feature that may be destined to document tragedy, especially in this YouTube age.