One of the big limitations you may have noticed with apps like ShopSavvy or even Microsoft's own Tag app is that live-scanning of barcodes is not permitted--you have to snap a photo, which is then scanned before a look-up is performed. It is technically possible but Microsoft is not allowing developers access to the APIs necessary to implement--not yet at least. [Edit: Although LG does have a live scanner called 'ScanSearch' available on the Quantum and Optimus 7]
Sensboston, who's been doing lots of neat tricks for our new OS (e.g. flashlight), has managed to use the previously documented API to release a working scanner. Based on zxing library and Kevin Marshall's (from Clarity Consulting) code, the app works like other barcode scanners on other platforms: you turn it on, it live scans and gives results. The app works offline, can save info to email or SMS and searches for info using Bing or Google.
Source: XDA Forums; Update: Project is now open-source
