Vehicross antenna flags would be cool!
A couple of suggestions;
Keep the flags small enough, so they won't add enough wind resistance to pull the mag mount antennas off the roof at 80+.
Keep the graphics simple enough so they can be read from a distance (letters only, no VX picture).
I think the modified bumper sticker is a great idea, folding the sticker around the antenna in the middle and back on itself, like a ski lift ticket.
