I attended a Nikon D90/D300/D700 seminar sponsored by the Houston Camera Exchange.

Paul Van Allen with Nikon was the speaker. He is a fountain of knowledge when it comes to Nikon cameras and accessories.

Some of the topics covered

Metering - Matrix/Spot
Exposure Mode Dial
How to reset camera to factory specs (very useful) - find two green dots and hold buttons down for 3 seconds.
Input dial
FX versus DX lenses -
- DX image lens circle is smaller than FX
- DX lens does not magnify
Lens types
- Portrait Lens (85mm)
- Macro Lens
Menus
- Setup Menu
  - Format Memory Card
  - Battery Life
  - Clean Camera Sensor
  - HDMI Capable
- Custom Menu
  - AF Area Mode
  - Pinpoint Focus
  - Dynamic Focus - Best on moving objects
  - Timer
  - Function Button
- Shooting Menu
Image Size - JPEG Fine / Large is recommended if you don't use NEF Raw files (NEF = Nikon Electronic File)
Software
- Nikon Capture NS2
- Nikon View
Color Groupings - Standard, Vivid, Pastel, Monochrome

Links

Nikon USA
Paul Van Allen's Flickr Photo Stream
Getting the Cool Look - Article by Paul Van Allen explaining some lighting and Capture NX2 techniques.
Nikonians
Strobist - Lighting resource
Larry Wheeler Photography

^..^