So, only just got my HMZ-T1 yesterday and wow I love it!
However I really wanted to have head tracking, but after reading these forums a fair bit I ended up downloading FreeTrack.
Wow, that software is brilliant! I play alot of Planet Calypso (Entropia Universe) and really wanted to have head tracking when I played it.
All of 2minutes of playing around with FreeTrack and I had it use the blue light on the visor to track my head movements and relay it to the mouse, then in EU turned on Mouse Look.
I didnt really understand why the HMZ didn't have headtracking, but now I do... it saves on cost and the blue light is very effective to use for tracking.
You only get 2 DOF though, and translation will be decoded as rotation... I would get a 3 point clip if i were you. I bought the 3 point model from TrackIR, and mounted it to the HMZ ghetto style with ties