For the universal OBD1 loggers, I'm pretty sure that would work on our cars. But then you are expecting to be paying lotsa $$$.
www.pocketlogger.com has an OBD1 logger on Palmpilot for the 1Gs only. I asked them about it for our application. They told me it wouldn't work and they will eventually release a version for us. It probably has something to do with the differences between Mitsubishi vs Chrysler ECUs.
TMO also has an OBD1 logger too, but I believe that won't work for us either. (I haven't tried, so if anyone has a 1G logger, please try and prove me wrong!)
One other thing, the early model 2GNTs are really weird. If you look under the dash you will find two connectors, OBD-1 and OBD-2. What were they thinking?!? Why didn't they just go with OBD-2 in the first place!! ARGHHH Seems to me that the early models 2GNT were rushed out the assembly plants.