#1. "RE: Why won't SB800 go above 1/250 shutter?" In response to Reply # 0
The sync speed for the D200 is 1/250th of a second. In order to take a flash picture the shutter has to be completely open. The fastest shutter speed where the shutter is completely open is 1/250th of a second. At speeds higher than that the shutter is actually a slit moving across the sensor instead of being completely open.
You can get around this by using custom setting e1 to change the shutter sync speed from 1/250s to 1/250s (Auto FP). This causes the flash to "pulse" instead of releasing one big flash which provides illumination while the shutter slit is moving across the sensor.
This will reduce your flash range but will allow you to use flash with shutter speeds faster than 1/250th.