The firms Bar Code Revolution [barcoderevolution.com] and D-Barcode [d-barcode.com] use a unique process that allows for an original design element to be integrated into a traditional barcode. While retaining the functionality of the barcodes themselves, their visual appearence are augmented with beautiful iconography or outlined in larger graphic patterns.
More barcode design collections are available at creattica and ESBlog. Via Fast Company.
See also Barcode Plantage and Barcode Art.