app that uses gsensor and gps to track gas mileage

[piratedninja]

i cant remember where i saw this, and i cant remember if this is for the iphone or windows mobile
but i saw something somewhere that talked about how a smart phone app can use the accelerometer and gps to give you a somewhat accurate reading how how much gas you use up while driving.

like if you are the kind to always stomp on your gas pedal it uses the accelerometer to calculate the Gs produced and shows you how much gas you use up when you do that and how much you could save by not doing that

it also uses gps tracking to help it calculate everything

does anyone know where i can find a program like this? seems like it would be incredibly useful for everyone.

[piratedninja]

did some more research and found the program is infact for the iphone
http://www.hunter.pairsite.com/greenmeter/

it doesnt work with gps so i guess i didnt pay enough attention when i saw it before.

now to find a similar program for windows mobile.