Acabo de pasar por el documento que contiene el estado sobre las versiones de Firmware del iPhone y sus desbloqueos y lo acaban de actualizar, esto es lo que dicen:

As of December 27, 2007 it is NOT YET POSSIBLE to unlock Out-of-box 1.1.2 iPhones from USA or Europe yet. We are waiting for Apple to release the next firmware update (possibly 1.1.3) to get a new hardware access key that will allow us to write the modified bootloader into the phone's memory.

The iPhone hackers are working hard on the new unlock and as far as I know they have already found the right places to modify in the bootloader to unlock the phone. Just as I said before: we are waiting for Apple to release a new firmware update before the unlock can be released to the broad public.

Y por lo que parece hasta que no salga el nuevo Firmware 1.1.3 no se podrá hacer nada con la versión 1.1.2 OOB, osea que toca esperar.

Enlace │ iPhone Status Document