http://appshopper.com/photography/idataback
Have you ever wanted to buy a Data Back for your FILM camera to imprint data and shooting information into your film but you couldn’t get one as it is no longer in production? This is the app with similar function where you can use it in your iPhone or iPod touch! Just by a few clicks, you can record the shooting data like shutter speed and aperture for each photo. After finishing a roll you will be able to email back the data to yourself for storage or export. iDataBack is just the right app to let you record and learn how to shoot in FILMS!
You know what? The latest version of iDataback lets you combine your scanned digital images with your shoot information!
via:
http://blog.tinyau.net/archives/2010/07/28/idataback-film-photography-iphone-app