OK the server needed a reboot! I've ran cydia/jailbreak so it should be unlocked to any network now i think? And be fine to resell as 'unlocked to any network'?
no,,, once you jailbreak you need to download ultrasn0w from cydia
instructions how to is here including video and text tutorials..
iClarified - iPhone - How to Unlock the iPhone 4, 3GS, 3G Using UltraSn0w
unlock and jailbreak are different things, jailbreak enables me to install what i want with out approval from apple, unlock enables me to use any carrier but you have to jailbreak in order to get the tool to unlock.