I went through the excellent video tuning guide at Lukes Video and got some great tips on using the histogram for adjusting brightness/contrast.

Does anyone know of something similar that explains the Sharpness, Gamma, White Balance and Backlight adjustments?

I've fooled around with them a bit and noticed some of the changes they make, but it would be nice to have something that explains what they do and gives examples of what the differences look like.

The btwincap site doesn't give a whole lot. Or at least I couldn't find anything... other than brief descriptions. There are a lot of FAQs there, but I can only read yellow text on black for so long.