AppVee has video reviews of two new apps for Google's Android phone platform - bar code scanners that use your phone's camera for image capture. (see YouTube links at bottom).
From MIT's Ad Lab article:

These applications seem to be among the few with one or two natural business models built into them from the start. Placing contextual recommendations next to price look-up results is one; powering branded wishlists and registries is another.

MIT Ad Lab article about the apps

Previous MIT Ad Lab article about Instant price Checking at retail

YouTube videos:

URL: http://www.youtube.com/watch?v=t2zMPbVFIYE

URL: http://www.youtube.com/watch?v=IZkxkvWq9zE