[RobRich]

AFAIK, launch control does not void warranties on the Cobalt SS, HHR SS, VW GTI, and lots of other cars offering the option.

What Nissan did was offer an option, but basically did little if anything other than a fine print to tell owners that using said option could void warranties. The owners are instead finding out about the fine print when Nissan tells them to replace a $20,000 transmission. That is pretty pathetic IMO, with the resulting negative PR probably being the reason launch control is reportedly being dropped for 2010.