I wrote something very similar to this in 2000 when the CueCat came out – and called it “TerraList”. Unfortunately it was hosted in my closet, and I never re-launched it after I moved to London.
“Barcodepedia is a community-based online barcode database, where everybody can contribute whichever barcodes they have lying around on their crowded desks simply by holding it in front of your webcam. The database is completely free to use, and everyone is invited to participate. The site should be available in French, Russian, German and Swedish within a week, so get all your friends and go to your local store with a laptop for massive fun. Donations of cuecats and other specialized scanners are welcomed.” – Slashdot, Thor Larholm