dataguy
Been here awhile...
I just saw that FUZZYCar just became free. Combined with a $150-ish Kiwi ODB-II scanner with WiFi, it looks like a pretty decent solution.
[ame="http://www.youtube.com/watch?v=bqk7Algq5s8"]YouTube- FUZZYCar iPhone Application Introduction[/ame]
[ame="http://www.youtube.com/watch?v=bqk7Algq5s8"]YouTube- FUZZYCar iPhone Application Introduction[/ame]