JPL and NASA have combined forces to create this awesome robot which they hope to land on the moon in a decade.
ATHLETE (All-Terrain Hex-Legged Extra-Terrestrial Explorer) has six legs and wheels. It can run on the wheels or use a stepping motion.
ATHLETE can also lock it wheels in place and add tools to the wheel motor such as a drill or a grip to pick up objects with. The flat top allows it to transport up to 450 KG or more if connected to another ATHLETE.
See video here.