I think as with any automotive forum, the people who seek them out are real car people. I've seen plenty of Crossfires driving around that I wouldn't be caught dead in, unless their owners cleaned them up and took more pride in their car. Car people they were not.

As for stickers or license plate frames with the site URL, I wouldn't want one on my car just because a www.whatever, IMHO looks tacky on any car. If your really interested, check with REDCROSS. He is into XFI stickers and sells them to forum members for $10 a wack. Maybe he could help you out, but on the other hand, he has sold only a little over one hundred in two years.

As for resources, any quality graphic/printing shop can do the decals for a very reasonable price. I had several "powered by Mercedes-Benz" decals made up for my windshield and door sills for under $20 (see the pic in my sig block).

Good luck with your idea.