OH MY GOD
If you like crisp images. You, my friend are in for something really amazing. HDR images are what you are missing in your life. They're cool, they're hip, they're HDR!
But really though, they're pretty cool.
Here is how it happens,
Take a billion versions of your solid image (really like 40 versions.) Each version of your image must be taken at a new shutter speed each time. This way you have every possible light exposure for your image. After you have your images, you will use the HDR program in photoshop to blend each one of the 40 versions of your image together so that they create one ultimate image (which contains every possibility for light exposure). Then in the HDR program within photoshop, you can make your tweaks as you please. And, BAM you've got yourself one mighty fine HDR photograph.
Here is a more descriptive tutorial from a website i love called psdtuts. Look at it.
Here are some really cool HDR images.