I played with my new toy on the way to work this morning.
Horsepower, O2, and fuel trim all work. Torque, A/F ratio, the post-cat O2, and knock retard do not. I'll have to work on finding some alternative codes for those.
Fuel trim was all over the place. Short term fuel trim was anywhere from -5 to 5. Long term fuel trim was 12 at idle and as much as 20 on acceleration. I was surprised that LTFT varried as much as it did.
O2 was also all over the place, anywere from 8 to 70. Not quite sure what that means, or even what the units are!