I think it might be awhile before we see the shifter since we have heard nothing about it lately. They're done with the PWC which I think was taking all their time away from the CS Shifter and CS Handbrake since they said there was no way these things would come out before GT5. Even though they have more time to work on these products now I would not expect it anytime soon unfortunately.
IMO the gearbox model needs to be improved a little in GT for the H shifters. I haven't tried it in GT5 but from what I understand it is similar to GT5P.
Anyways, I too am looking forward to this shifter but I really really really want to see a shifter with FFB. Problem is that we will need the software for it too.