The slideshow (Ridge Storm) below is a quick one I did last summer while I was experimenting with HDR (high dynamic range). Photomatix is the free trial software I used, as evidenced by their logo. If you can put up with the logos, the free trial download can be used indefinitely.
HDR requires shooting 3-5 images or so, bracketing the "over" and "under" exposures so that the HDR software can then make a composite image. In this way you've got the shadows opened up and the hightlights filled in with info. My Nikon D80 has a 3 frame, +-2.0 setting that works well.
above, HDR - final composite
middle exposure
2 stops underexposed
2 stops overexposed
HDR can be used in subtle ways to obtain a more perfect exposure of a difficult lighting situation, or it can be used for extremely dramatic, 3-D like effects. Once you figure out your camera's bracketing procedure, haul your tripod out and decide on a lighting-challenged subject. It's fun to see what "cooks up" later in the HDR software's compositing process.
I didn't know about HDR while I was shooting the "October Party" sunrise images, but wished I had, as I did a fair amount of post processing to better balance the skies' exposures. HDR is the sort of post-processing tinkering that will remind you of the fun part of being in a traditional darkroom.