Pictures of my Odyssey have been posted to the Gallery, including video on the Navi screen shots.
The 4 (2 on each side) buttons are for extra radio controls (7 total with 3 factory). They are perfectly within fingers reach while driving. The buttons (sold at Radio Shack) fit inside the 4 screw holes on that back side of the steering wheel and are held in place with a little black silicon glue. Each button wires to a common ground and the provided 'resistor network' with Peripheral's PESI-W3 infrared steering wheel controller (link below). Aside from doing the basic soldering/wiring, the tricky part is drillling a small hole on the inside of each plastic shaft (for 2 wires), then screwing it back in place, soldering wires to push button and apply the silicon glue.
For those interested in my silver switches and lights in the fog light switch cover they are (top to bottom, left to right).
1. Navi (up) and Video (down) switch
2. Small red push button for 15 min. bypass on cell phone mute (the kids in back watching a movie request this one when moms talking on the cell phone!).
3. Green ON indicator light for cell phone mute bypass.
4. Red ON indicator for rear monitor(s)
5. Small switch for selecting navi video source. (Up DVD player, down whatever is playing in the rear).
6. Power ON for rear monitor(s) and TV tuner.
Steering wheel programmable interface
http://www.peripheral-aamp.com/periph_products/steering_interface.htm