GM made a great campaign for it new SUV, the Tahoe. With a great user interface, you can build your own ad for the SUV, and with it participate in the contest.
The thing is, people are concerned with global warming and excessive oil usage, as you can watch on this comercials:
For how long will this be available on the site? How long does it take GM to apply censorship? Let us wait and see.
Comercials seen on Nina Paley's website.