People seem to be using QuickPwn and a 2.0.1 ipsw to jailbreak their 2.0.2 phones. This may seem totally OK, but you are playing with fire here. What you are doing is flashing 2.0.1 stuff to the NOR on a 2.0.2 iPhone. Please also know that, on the flipside, you can't brick your iPhone. It is just a risky thing to do. Worst case scenario is you needing to have a DFU restore because you flashed older stuff to the NOR of your iPhone than what is intended to be there.
Just letting everyone know