This is driving me nuts. I've got a 92. My laptop with serial on it has a dead battery and no brick so it's out of the running (would cost over $80 to get it charged), which leaves my laptop which only has USB. If someone can find me a relatively cheap way to connect this to my car, I would be way more than happy to test it out.
My ECU says M7 on it.
http://img156.imageshack.us/img156/3218/svxecu1xe0.jpg
I've been itching to try this program out, and was going to wait... but with all the "productive debate" going on in here, I just can't.