Bar code scanning with AIR for iOS and iPhone camera

Can anyone point me in the right direction? I am interested in building an iPhone app that would use the iPhone camera to photograph and decode bar codes on grocery items. The CameraUI and CameraRoll classes get the image into memory for me. I found the SimpleUPC service that will provide info based on the UPC number found on the bar code. What I think is missing is a reliable OCR routine to accurately scan the image and return a string of numbers. Any ideas?