There are 2 types of Google Nexus One devices : Retail and Google’s holiday gift to its’ employees. The retail version bought from http://google.com/phone has its bootloader locked but Google lets you unlock your bootloader unlike Apple! Google warns that the warranty will be void if you unlock the bootloader but seriously, unless you install some really dumb applications, you cannot damage the device.
Rooting your Google Nexus One is a 2 step process. One, Fastboot and the other Superboot (courtesy Paul from Modaco).
Download this file (Rapidshare). or you can also …