Well I guess I will have to answer my own questions.
I've been searching high and low. It appears that "most" Garmin have a hidden display on most GPS Units. Touch the Speed displayed in the lower right corner and it will take you to a different display.
Garmin is doing some really smart stuff. They have a new "Eco-Route" to be release next year. Ties into the CAR Computer via OBD II port to monitor car functions. A bit expensive but really cool. See link below.
http://green.autoblog.com/2009/11/09/ga ... pear-soon/
Hope the info helps!