Corvette Racing's C6.R won the American Le Mans Series' inaugural Green Challenge competition at Petit Le Mans, but General Motors' troubles with the type of green that really matters have thrown the Corvette's future into disarray. Multiple sources confirm that the General's financial crisis has led the company to put whatever plans it had for the next-generation Corvette on indefinite hold, with no official or set timetable.In this climate--we've even heard tales of janitors removing lightbulbs from corporate headquarters in an effort to save money--not only is an all-new C7 now more than just a few years away, but even a significantly refreshed or upgraded C6 looks unlikely to appear anytime soon.