Chrysler owns the trademark "Challenger" insofar as it relates to the car, but they don't have any legal claim to "challengertalk.com". Unless, of course, they own this site. In any event, whoever does own
www.challengertalk.com probably has an implied trademark on the phrase. I'm pretty sure that's possible, though I'd have to check with a PTO lawyer to be sure, and that's frankly too much work. In any event, whoever owns the site ought to just set up a shop at
CafePress: Unique, custom t-shirts & gifts to express yourself, upload some art, and let people make shirts, hoodies and coffee mugs to their heart's content. The profit could be used to support daily operation of the site, much as vendor's fees are. Nice thing on cafepress is that no actual money has to be laid out to make the product- it's all one-offed as people place orders. Not the most efficient way to go, but better than someone being stuck with 240 extra 'small' shirts that they ordered but can't sell.