Determining TrackPoint pinout
I managed to completely reverse the pins of this module:

Considering your first picture above, being the rightmost pin the number 1 (near the white dot), I've got, from right to left:


Mousebutton0
Mousebutton1
Mousebutton2
5V
Reset
Clock
Data
Ground


Update: I confirm it works finally as described above. I'm using tmk firmware and tried on teensy2.0 and pro micro.