Photographer Peter Krogh has just published The DAM Book: Digital Asset Management for Photographers. I haven’t seen a finished copy yet, but I’ve attended Peter’s lectures & can vouch for his insight into how new technologies like DNG facilitate open workflows (e.g. batch-adjusting color in Camera Raw, then passing DNGs with embedded previews and metadata to iView Media Pro).
[See also: Peter’s related DAMUseful.com and the publisher’s site for the book.]