I'm a social media marketer working on behalf of BP to help spread the word about an automotive photo contest that I think your users would be interested in (they’re giving away free gas cards weekly and a grand prize trip to the 24 Hours at LeMans).

All you've got to do is upload a cool photo of your ride and in 600 characters or less, describe why your car "is worth it."

Check it out here: http://amocoultimate.cardomain.com/

The contest is largely judged on votes as well, so if you guys coordinate it, you would probably stand a good chance at winning. Also, if you've got a blog or site that you wanna promote your entry on, you can grab the widget here: http://m80im.com/newsroom/2008/08/19/bp-amoco-ultimate-is-your-car-worth-it-photo-contest/