Norbie is the only one I know planning on doing this.
If you don't have a JZ motor, it will require some extensive custom work to bolt it to another motor.
The clutch setup is different too
Then there is the issue of the shifter coming up 6" further back than stock.
But I beleive there are solutions for this.
Finally there is the fact that the driveshaft is completely different to normal style, so a custom one is needed.
Expect a good 5k to do this.
Dropping in a 1GGTE and J160 6 speed is a much cheaper option.