From Paste Magazine (pointed out by a Facebook friend).
"Make your own 'Obamicon' — your image in a style inspired by Shepard Fairey's iconic poster. Regardless of your candidate of choice in the 2008 election, here's your chance to sound-off.
"Take your picture with a webcam or upload a photo, choose your own message, and submit to the gallery."
The site requires that you sign up in order to save images. But it's free, and they say they won't sell your e-mail address to anyone.