Honda's 2010 INSiGHT Hybrid Sedan
Honda launched the first electric car with the Insight and it was available during the 2000 - 2006 model years. Honda is introducing it's new version for 2010.
" ... 2010 Honda Insight has made its debut on America's streets. ... hybrid technology ... affordable price and 41 mpg* combined fuel economy. ... increased the green factor with a sophisticated new system called Eco Assist™"
"*40 city/43 hwy/41 combined mpg. Based on 2010 EPA mileage estimates, reflecting new EPA fuel-economy methods beginning with 2008 models."
Via: Honda LINK
Eco-assist is " ... interactive, driver-focused fuel-economy enhancement technology ... comprised of two main components: an ECON™ button ... that modifies the way the car works, and a 
sophisticated feedback system. ... can work inividually or in tandem to help boost your overall fuel economy. "
"... driver-activated ECON™ Mode ... kicks in when you press the green ECON™ button ... ... optimizing control of the continuously variable transmission and engine."
" ... feedback function that uses Ambient Meter, the color enhanced speedometer background, to provide real-time guidance on environmentally responsible driving. When you're driving efficiently, the background color is green. ..."
Via: Honda LINK