just a minor nit: all phones have locked bootloaders. it's a critical feature for securing the contents of the phone and it increases the security for the end-

just a minor nit: all phones have locked bootloaders. it's a critical feature for securing the contents of the phone and it increases the security for the end-user by not allowing anyone that steals the phone to read its contents or flash a fake rom. what you're talking about is the ability to unlock and relock the bootloader at will. my nexus s came with a locked bootloader, but i was able to easily unlock it, flash my own rom, and then relock it. if the phone is stolen, someone can easily unlock the bootloader but the phone's data will be erased in the process.