I wrote a little piece for inside Lightroom on the final release of the camera profiles. Check it out here. I gave some examples on how the camera-matching profiles can often give you very good starting points for developing your images. Here is another example. This is a shot I never looked much at from Monument valley. It was quite hazy and my camera's command dial was shot because of a car incident the previous day. The ACR default rendering is quite boring and the colors are just completely weird explaining why I never paid much attention to this image. Nothing like what I saw over there. Hover over the text links to see the result of different profiles applied to this image. It sometimes takes a little time for the images to load initially, so be patient.
ACR 4.4 (the default profile for the D50)
camera vivid with some optimizations
The last version shows the result of some minor changes to the development using the vivid profile. Mostly just black level increase and a white balance change to get some more magenta in the sky (as I observed when I was there). Clearly, these profiles are very useful even if you're not as bad of a color junkie as I am.