Feedback on a project I've been working on

[codrum]

why no iPhone?

I'm more comfortable in the Java/Android SDK environment right now. If there is enough interest in the system I would probably partner with an iOS dev to port the code.

could you do oil temp as well as oil pressure?

The temp gauge and configuration is setup for any NTC thermistor, oil included. I would assume most oil temp sensors are as such so there should be no issues connecting one to the temp input. You would need to know three points of temperature/resistance to calibrate it correctly but that's usually provided by the manufacturer on the datasheet. Similar to how this IAT sensor has the three point curve provided. I know VDO and other major MFGs provide similar data.

could this be integrated into a radio receiver with a pop out screen some how? that would be sweet.

Not currently, phone integration is a much bigger market right now and it makes sense to pursue it as it grows everyday. The next hardware receiver would be iPhone support before anything else.