So I have my 3G iPod Touch. It's on 3.1.1, but I'm going to upgrade and possibly jailbreak if you guys answer some questions for me. 1) How do I remove the jailbreak if it doesn't work out/I don't like it? 2) Because it's tethered, what happens if the battery dies? 3) Will I have to restore and lose all my data because Jailbreaking?