Greetings. My name is Jeremy Trammell and I represent a group of developers and designers in Portland, Oregon, in the U.S. We have extensive experience with both native Android OS applications as well as the Sparkfun website (many of our hardware projects utilize the Arduino which they have an extensive catalog of parts for!) We have not worked with the IOIO board yet but after a brief review of the specs I don't see any serious issues, although there do seem to be a number of reports of difficulty getting their support library to integrate correctly with Eclipse. I do have one question though. In addition to oil temperature, fuel level, engine temperature, volts (scaled down to 0-5 from the 12.4 battery I assume?) and RPM, you mention speed and GPS. I assume that you are implying that you do not actually have a speed sensor, and that you want the application to calculate the current speed based on a series of GPS positions over a given time interval?