Adam, I'm pleased to hear you found the article informative.
The Canon Powershot SX10 IS has a 1/2.3" sensor, which is much smaller than the DP1 sensor. CMOS sensors come in different sizes. The SX10 IS also weighs 560 grams, which is heavy. If I was looking for a small sensor compact I'd consider the Canon G10, Panasonic LX3 or Ricoh GX200 on the basis of images I've seen and reviews. All of these are much lighter than the SX10 IS.
The problem with colour does depend on monitor type and calibration. Ryan and Rick both make good comments here. Small JPEGs on a screen aren't representative of the raw files or of prints, especially large ones. At low ISOs small sensor compacts can produce images that look excellent on monitors and can make good small and medium size prints. The advantages of bigger sensors are better quality at high ISOs (which means they are easier to handhold in low light) and for large prints. For photography in good light, viewing on a screen and small to prints a small sensor compact is fine.
Ashley, the images at http://www.boxedlight.com/dp1/ look very saturated to me, especially the reds! On my monitor I can see no difference in the greens between the images in the review and the ones in the Autumn in the Cairngorms photo essay. Some of the images were taken on the same trip and have been processed the same way at the same time. 28mm is limiting but if I want the same quality from a camera with a zoom lens (or more importantly in my case it's publishers who require that quality) then I have to carry my DSLR. My ideal camera would be a zoom compact with a DP1 size sensor.
Sean, Ashley is right. The sensor size is key here. Of course the other factors you mention are important but it's the sensor size that makes the real difference. My Ricoh GR-D has a very sharp top quality lens, possible better than the DPI lens (though that is also good), but the images are nowhere near as good at large sizes due to the sensor size.