All Modern.com wall sticker art for $90.
I just love the barcode graffiti at Senses Lost.
Barcode protest art shown at Ad Land.
Barcodes Inc has an online generator where you can change the size and the output in order to create your design.
You can barcode yourself at Barcodeart.com. The barcode above contains data about my age, country, height and weight. At the site you can purchase your barcode on fun things like tattoos and dog tags. You can also get a custom painting for $350.
I'm adding the project to my lengthy craft to-do list. If you make one, show me! I'd love to hear how it went.