I have a lot of learning to do, I am hoping someone could aim me a little.
I will need to tie the GPIO pins of the N2 into the fuel injectors of the engine as well as the VSS and fuel tank gauge.
The app would measure the fuel used at the injector as well as the exact distance traveled via the VSS (vehicle speed sensor) and with calibration the amount of fuel in the tank.
end result I am hoping is a display like this:

This has been done with Arduino, if you're interested in that check out MPGuino.
I am also looking at taking the output of the MPGuino project and tieing it into an Android app that would just act as the display unit.
The end result is a 7" single display on my motorcycle. I am trying to avoid having separate displays for each thing.
Thanx