Hi I'm thinking of getting a 4G ipod shuffle, which i hear requires itunes 10. I have a Jailbroken Ipod touch 3G, if i were to update to itunes 10, would i lose the jailbreak? And if so, would it just unjailbreak it, or would it render the ipod useless or what would happen? What can i do about it? how can i unjailbreak if that is the case?