Portraits straight out of the camera
Here are some very nice portraits by TFarris Photography, with no postprocessing whatsoever, giving a good idea of the skin tones possible with the Canon 30D.

Related links:
» Forum post, and larger version of the portraits
Equipment used: Canon 30D, Canon EF-S 60mm f/2.8 Macro USM (for all but the last image) and Canon EF 17-40mm f/4L USM (for the last image) lenses.