I would encourage readers interested in using digital images in work orders and other data collection applications to read this blog article. It talks about how to create a mobile application that allows you to take a digital photo, draw on it and make notes on the photo and then synchronize this edited photo into a central database for record keeping.
I have seen this request from companies doing job estimates on handheld computers. They want to take a digital photo and highlight the problem areas. This information gets sent back to the office where a supervisor can review before delivering a final job bid.