PP done mostly in Lightroom - tweaking out exposure, fill light, tone curves, some color work, dust spot removal. finished up in CS4 sometimes for more fine tuning in curves, and with the PTLENS plugin to fix barrel distortion and Noise Ninja and to add the border.
the colors on the 30D are so-so which is why i really wanted the 40D to work for the 14-bit color but that conked out on me on day 1-2 there, so yes, i do some saturating of the blues, maybe desaturate some of the beige, i kick up the green a touch. nothing crazy.
for example, the dunes were quite orangey-red in real life, like in the first shot, but on the 30D they come out almost a dull tan. so in many ways, the PP is just bringing it back to reality.