I would be that touchpad uses ps/2 still, even though it is not the same as the synaptics one. I bet if you find the datasheet for that controller IC you could find the pinouts quite easily on that connector.
i just ordered a dell 600m palmrest/touchpad, and im using the palmrest to repair my friends laptop. i will have the touchpad soon, and since its spare, i was thinking about making it ps/2 compatible. anyways, warrior rocker, do you think you could repost the pictures, cause i do not see any of the ones you posted. or if you would like to email them to me, contact me through p.m. so i can give you my email.