Here are some lighting sites that you might find interesting.

Chuck Gardner has some interesting points to make.  Take a philosophic tour with Chuck and see exposure, lighting, and a bunch of odds and ends through his eyes:

If you want to learn to create stunning images using your on-camera flash off the camera,  you have to check out the Strobist:

Check out the lighting themes at one of my favorite places: The Lighting Forum at  Watch and learn as the seasoned and the aspiring bring their game:

Navigating can be tricky, but you can certainly glean lots of interesting info at Professional Photography 101: