i sync the 3g to itunes? i am looking to jailbreak my iphone 3g so i can pretty much use it as an ipod. I am afraid that if i jailbreak my 3g and sync it to itunes that it will mess up my iphone 4. will this occur or am i good to go. i don't want to just jump into it and risk it. i have looked for the answer and have come up with nothing. so if any one had done this let me know.