If you are interested in digital photography and Photoshop, check out this site that I stumbled across.
Not anther “cookbook” kind of site, rather it explains how digital cameras work and how the data they generate when they record light is affected by various camera settings. Also, the same data is manipulated by Photoshop in post processing. For the first time, I understand what a tone curve and an unsharp mask are.
Dagny's Desk 