In reply to:
Yep, that's part of the evolving design
Cool. So basically we are talking about a serial multiplexer with support for a GPS, ODBII, DACs and one-wire right? That is cool and I would definitely be interested in one or two if you can get a kit together for $50ish.
The problem that I see is that a lot of the people who are interested would probably want variations. For example, I wouldn't need the Oncore/Trimble support since I have a nice Garmin GPS16 so I would really just want a loose serial port. Bluetooth would be a sweet option as well.
-Mike