Playing around with CHDK RAW files and Adobe Lightroom, I've found the following settings that, to my eye, produce more accurate colors than the camera's jpegs. They aren't perfect settings by any means, and might not match your particular camera, but I'm pretty happy with them; I have no experience in calibration and I'm a lightweight photography anyhow. I thought I'd share in case anyone wants to enjoy them, or, better yet, improve upon them and post their improvements back here.
Camera Calibration
Shadows
Tint -13
Red Primary
Hue -25
Saturation +5
Green Primary
Hue +44
Saturation 0
Blue Primary
Hue +11
Saturation +5
HSL
Hue
Red +15
Orange +12
Yellow +10
Green +6
Aqua +7
Blue +10
Purple 0
Magenta +23
Saturation
Red +5
Orange +5
Yellow +33
Green -33
Aqua 0
Blue +5
Purple -15
Magenta 0
Luminance
Red +3
Orange -1
Yellow -5
Green 0
Aqua +18
Blue +20
Purple +47
Magenta -17
Hopefully I can figure out a way to make an ICC profile, because my Lightroom demo will eventually expire. :-)
