Nikon CLS Tutorial Video
The headline pretty much says it. This three-minute video shows you the basics on quick-and-dirty wireless TTL operation with a Nikon SB-800 and a pop-up flash CLS-enabled camera.
This guy uses a D200, but there are several other Nikons that work in a very similar way.
And remember, you can use CLS to merely trigger the strobe in the manual mode, if you want to do your own driving.
I'm just saying.