I really dig the guidelines featured on the UPDIG site.
The UPDIG guidelines aim to clarify issues affecting accurate reproduction and management of digital images. These guidelines were created to establish photographic standards and practices for photographers, designers, printers, and image distributors. The guidelines cover Digital Asset Management, Color Profiling, Metadata, and Photography Workflow.
Thanks to David Riecks, a contributing editor to the UPDIG project, for pointing this site out.