OK, I know this might be a bit wild, and I am typically for things being simpler, not MORE complicated, BUT.
What if you made the controller with an ethernet jack and could run that to a Scangauge? The ScanGauge gives you engine (motor) RPM, coolant temperature (motor temp!?) and lots of other cool information.
If you could create a data output from the DIY controller that would output info in a way the Scangauge could interpret, you would have a pre-made instant-read display! Plus, lots of us already have Scangauges!
Otherwise, a controller output to an MPGuino would be super-slick as well!
In the mean time, I will stick to my analog ammeter and voltmeter.
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