How about before everyone starts going off in different directions we come up with a roadmap for the project. That means someone will have to take the lead in the project.
Something like for it to be considered V1.0
- vss input
- injector input
- vss and injector calibration routine
- menu interface to configure and operate the system
- realtime mpg and whatever trip meters or other information that can be gained from those two sensor inputs.
V2.0 for example something like this
-TPS, MAP or whatever additional inputs are desired
-outputs for stuff like alternator disable, vibrating motor attached to the throttle pedal to alert the driver to ease up. or whatever other stuff needs controlled
v3 no idea
Once you get the general idea of how the project should progress it could be created on sourceforge and seek donations to build a treasury to help the developers and to offer a reward/bounty program that pays for each part of the to do list that is completed. That will get a lot more coders involved than would otherwise contribute. For the little that would need to be donated a lot of work could be done.
So really as long as there is one person with enough time and dedication to be the project leader even if they are not really as good at coding as the others, and they are willing to maintain the project and keep it going the right direction, it should be easy. V1 would probably be able to be finished by summer since it would be a basic design. V2 could stretch on for a while depending on how complicated it would be but I think getting a basic V1.0 system up and going fast is most important.