This was an exploratory module for me to learn how field formatters worked in Drupal. While learning, I think this facebook-style image formatter will be helpful for people.
BETA WARNING: This software is currently in beta, please do not use it on a production site.
Features
Uses the Google Maps API V3 to display large images on a page. It allows users to zoom in on an image, and pan/move across the image. As the module uses Google Maps API V3, it is compatible with the vast majority of modern clients, including iPhone, iPad, and other touch devices.
Use of the module is recommended for very large images (>100Mpx), although it will still work with small images.
As the module integrates with the Google Maps API V3 module, it will be possible to annotate images, and select regions of an image to be cropped/extracted.