As an incentive for people to snatch up their slide-screened handheld the day it hits store shelves, Sony has announced that it will give anyone who registers their PSP Go between October 1 and October 10 a totally free copy of Gran Turismo PSP. That is to say, a totally free download of the full version of the game. It really wouldn't make much sense for Sony to send a UMD for you to play in your brand new, UMD slot-less device, now would it?