I’m pretty sure that this app exists for other smart phones and I know that a similar thing exists for normal PCs.
An App that scans the barcode using the built-in camera and then allows you to look it up on your choice of site: froogle, Amazon, whatever… To see if you want to buy it on-line instead.
I’d write this one myself, but it isn’t anything I’d be that jazzed about writing and supporting for a long time… It should be something that Amazon would jump right on if they weren’t worried about getting sued…
looks like NeoReader or Barcode in the App Store do this, but neither seems to do it very well…