Louie,
I fly the Dash 8-400 ("D") model, a 70-seat version of the Dash 8. It's a turboprop, but cruises along at around 360 kts TAS. Both the captain and I have our own multifunction displays and primary flight displays. In flight, the multifunction displays normally depict navigation data and terrain (a "moving map"), while the primary flight displays show attitude, altitude, airspeed, vertical speed, etc. We also have a large engine display in the center of the panel which shows all the engine parameters (torque, rpm, NH, NL, oil temp and pressure, fuel temp, etc.).
The multifunction displays can be toggled between the navigation data and aircraft system displays. If you want to find out "what the electrical system is doing", you can jump over the the electrical page and inspect the generator and battery loads, etc. We also have the capability to display weather radar (instead of terrain) on top of the navigation page. It's pretty common to see one pilot flying along with the terrain display up on his side, and the other guy with the radar selected.
The terrain mapping feature described by A300Capt is almost identical to what we have in the Dash. The terrain around the airplane is displayed as a colored map, with red and yellow representing higher terrain and shades of black and green used for lower terrain. Oceans are shown in blue. The detail is truely amazing - it looks a little like a sectional chart. We can also superimpose symbols for airports, VORs, and other aircraft.
As A300Capt said, this system is extremely useful when operating into mountainous terrain, especially during night or instrument conditions. It's extremely cool watching the terrain on the display change from green and black to yellow and red as you descend into a mountainous airport (say, Sun Valley).
Hope this wasn't too technical.
FFFI