It's confirmed that if you have a 2G iPhone that is unlocked with BootNeuter (running firmware 2.2.1), you can safely update to OS 3.0 using iTunes (yes just press that Update button).
For detailed and step-by-step instructions see here
It's confirmed that if you have a 2G iPhone that is unlocked with BootNeuter (running firmware 2.2.1), you can safely update to OS 3.0 using iTunes (yes just press that Update button).
For detailed and step-by-step instructions see here