[matthoffman]

I just tried this last night and I was unable to get it to work
Had to boot into bootcamp windows xp for it to flash/unlock correctly.
I believe the problem is once the software on windows restarts the phone into bootloader mode the computer detects it as a different usb device. This by default would then not be automatically detected by windows under osx unless you forced the usb device to connect to windows via parallels. I could never get it to unlock correctly until I just rebooted into windows. It then worked like a charm. Hopefully this makes sense :P.