[hBLOXs]

CONFIRMED! My U.K. iPhone is now working just fine here in the U.S. I'll whip up a guide as soon as I can. I may post text notes here.
This guide will be going into the 1.1.2 section which is deprecated. I'll post here when the guide is up. Mac guide is first then the Windows guide.

My very brief notes: iPhone jailbroken on 1.1.2, DFU restore to 1.0.2, iNdependence out of recovery mode, activate/jailbreak
then install SSH with iNdependence, join your Wi-Fi network, use Fugu to install the Installer,
install BSD Subsystem and Terminal, copy the gunlock files and the 04.02.13_G fls to /usr/bin, chmod +X the gunlock files
in the Terminal enter launchctl remove com.Apple.CommCenter, then enter gunlock secpack ICE04.02.13_G.fls
You may have to do this more than once if you get bus errors, reboot iPhone and you should now have a signal.
You are still on the 4.6 bootloader. You could then restore to 1.1.1 and jailbreak it,
OktoPrep and then update to 1.1.2 and jailbreak and you are set.

GeoHot has created a software based unlock for 1.1.2 iPhones with the 4.6 bootloader.
You can read his comments here. I have a U.K. iPhone to test this on.
If all goes well (sometimes Geo leaves a bit of info out here and there), I'll tutorialize it.
Thank you again GeoHot!

-- February 8, 00:30 MST