I quite literally Stumbled Upon this website today. Sean T. McHugh on his site, Cambridge in Colour, posts a quite and extensive and comprehensive list of digital photography tutorials. He covers topics from understanding your camera, to Photoshop techniques, to how we perceive color, and many more. Lots of technical data, but written in a way that is easy for users at any level to understand and apply. A great resource!
Here is a little background on Sean:
To provide some background, much of this work was conducted while pursing my PhD in chemical engineering at the University of Cambridge. I have previously conducted undergraduate studies at the California Institute of Technology in Pasadena, California, also in chemical engineering. My doctoral research focused on understanding reactive flow in multiphase plumes (applications to carbon dioxide sequestration, cloud growth and volcanic eruptions).
As a scientist by training, I am fascinated by the interaction between technological developments and the range of creative options available to photographers. Improvements in sensitivity, ex post facto white balance control and real-time feedback from digital imaging are providing photographers with unprecedented low-light capabilities. Much of this fascination has been channelled into finding unique times, perspectives and techniques for capturing many of these low-light scenes in Cambridge.
As part of the Cambridge University Photographic Society, I conducted student workshops relating to general camera and SLR technique, photographic post-processing and low-light photography. These included participants ranging from those with their first camera, to more seasoned users wishing to refine their techniques. I encourage you to contact me if you would like further information about joining the society.