Sean Scanlon of bluedot has written an open source Perl script that will add camera make and model EXIF fields to JPGs.
EXIF is a standard for embedding exposure-related metadata such as camera make, model, lens focal length, shutter time, f/stop, etc. in image files. The data can be searched by image management databases, remind you of how you shot an image when you’ve long since forgotten, and many photo sharing sites like Flickr display them for uploaded photos. Dead useful! The hitch is that while digital cameras automatically add this info to every shot, you’re generally out of luck when it comes to adding this info to film or print scans. This script allows you to do that, and that’s why this script rocks.
Thanks, Sean!