Another guy raised a good idea regarding bumper stickers here: https://bitcointalksearch.org/topic/bring-the-price-of-bitcoins-up-with-publicity-bumper-stickers-242684
But I wont put a bumper sticker on my car. Like most people. A few people requested magnetic ones, but the discussion fizzled.
I found a site that will produce them for about $3.22 if you buy 50. I'd be happy to dish out the $175 or whatever to have 50 made. If you guys want to get in on it, please reply here. A single magnetic bumper sticker is about $11 on the site, so its still not that crazy expensive either way. I personally have a black car, so a black version would look sexy on my ride, but the standard logo is also an option. Maybe I'll have both made.
Here are the two I have right now:
and...
-Burger-