Haha, well, I clicked install and it counted down to the reboot. then it reached zero, said 'rebooting' and stayed there. Now It tells me I'm up to date. I don't mind, cause my rooted GB is the 605.3 with a fixed build.prop. I've had working GB for a while now. I'm happy that this ended up coming out, though, for the non-rooters' sake.
BTW, does this mean we can expect a full RUU? I'd like to get the new kernal, cause I've been afraid to try other ones. I'm still on the Froyo one.