Chevy has created an online contest in conjunction with The Apprentice to have customers create their own commercial for the 2007 Tahoe. The site provides a variety of shots to pick from and you can customize the order as well as the copy, etc.
Yesterday CNET reported that the company isn't screening the ads too closely as at least two ad are on the site depicting the SUV as anti-environmental. At the end of one of the ads, there's even a url for ExxposeExxon.org. See the ads here.