Here's a neat bumper sticker spotted by Flickr user Phantom Scribbler: symbols of the world's religions (and philosophical movements, I suppose) used to spell out "coexist"!
Link to larger pic [Flickr] - via straydog scraps
Oh, and there is the Coexist t-shirt (likely not related to the bumper sticker) -
* Peace Through Strength! *
All Dhimmis should have this bumper sticker on their cars. Islam is the true religion.