Ok i have a 8gb 3rd generation ipod touch. I plan to put spirit on it for an untethered jailbreak. Here are my questions I see you are supposed to save SHSH blobs before you do anything so that when the iOS4 comes out or any new firmware you can get back to a previous version? I dont understand...? And how do i use the SHSH blobs and revert back to a previous version firmware? What exactly am i supposed to do when this comes out? So basically, when i have my ipod touch jailbroken and they make me update to iOS4, will my jailbreak just not work anymore? Then what do i do? Do i have to restore my ipod using itunes, then wait for new jailbreak software for iOS4 to come out until i jailbreak again?