Yeah, parachutes might weigh a bit but nothing compared to the fuel you need to land safely, or the extra motors and fuel you would need to make sure you landed in the correct orientation. The case is pretty strong for unpowered descent, be it from a parachute, fixed wing, deployable wing (ala Rogallo), airbag or whatever.
Anyway, i've just heard about the Lunar X-Prize. While i don't doubt that people with the right knowledge could build a rover, and with enough resources could even build a lander - i can't really imagine any of the contenders getting into space in the first place (never mind with enough payload to get to the moon). Eventually perhaps, but certainly not by the deadline.