Update: here is an older post which shows how non-trivial this is to do if the camera doesn't do it (and only a few cameras do, yet).
Here is one of the clearest examples I'd done where you can see the advantage one can get from High Dynamic Range technology, even the one built into the iPhone 4. (I'm starting to regard that device as a camera with a built-in phone.)
You can see that in the standard shot, most of the indoor red color is lost, and the color in the highlights and the blue sky are virtually all lost. These are saved in the HDR version (a combination, in-camera, of three exposures).
They are not computer-manipulated except for slight cropping.
(The first to comment on the quality of the window washing wins the opportunity to come over and prove he can do it better.)