IPhone 2.0 Firmware Already Jailbroken
blog.iphone-dev.org
blog.iphone-dev.org
http://wikee.iphwn.org/news:pwnage
All they have probably done here is hacked the 2.0 firmware to include the installer app and then loaded it on first generation hardware with the bootloader vulnerability.
But ziPhone on Thursday (maybe it's still Thursday where you are) announced they've jailbroken firmware 2.0. See http://status.ziphone.org/
d'oh - but it's easy to use :-)
That's true in a few countries, Italy too IIRC.
However the locking is based on IMEI number, which can be changed with ziPhone for this reason.