1.1.3 Dev Team Jailbreak - Simplest (Windows only)
Download and extract this to any folder on your computer.
Run jailbreak.bat and everything should work on it's own.
When the download of the firmware stops at 100%, don't worry and don't close the window, just be patient.
This requires you to be on Wi-Fi on jailbroken 1.1.2 with BSD Subsystem 1.5 or greater, and OpenSSH.
Also, be plugged into some kind of power source, like the Dev Team recommends in the README.
Make sure you have lots of free space on your iPod too, you'll need it.
Thanks to the Dev Team for this method, plus everyone who tested this when it still had problems.