Unless we are looking at different threads (or posts?) then that one points to the blog post about the new quickpwn for 2.1 that is mac only. I need to know on the windows side.
just wait for someone to upload the custom 2.1 firmware so u can use it on windows. iTunes 8.0 doesnt need to be pwned so u can just restore with the custom firmware. itll save u lots of troube and time