I want to upgrade my jailbroken iPod touch 2g (3.1.3. os) to a JAILBROKEN 4.0 os. I know that jailbreakme.com can only jailbreak up to os 4.0 and iTunes will upgrade my iPod touch to a 4.0.2. if I upgrade my iPod touch with iTunes will it still be jailbroken/have cydia? Or should I jailbreak my already jailbroken iPod touch to the 4.0 jailbreak? if you could help that be much appreciated.