I love my new Share the Road license plate that is now offered here in Oregon. It's only $10 as a one-time fee and half goes to the Bicycle Transportation Alliance and half goes to Cycle Oregon, both bike-friendly organizations I support.
I noticed it looked familiar when it showed up. I've been a casual user of iStockphoto for some time and I recently designed a site for a race series a friend was throwing (first race is this Saturday and I'll be there in the beginner class!) and I used iStockphoto to get that cool outline of Oregon and the cyclist profile (I used a slightly different illustration). When I opened the DMV envelope I instantly recognized the cyclist, because it's this file, just reversed, and with the water bottle removed from the outline.
I'm not faulting the designer, iStockphoto is a great place to get super cheap illustrations and I use them all the time, rather, I'm more stoked that an illustration there ended up working all the way up to an optional state license plate.