I'm on the tipi top of the fence on wether or not to jailbreak. My ONLY concern is if my 3G suddenly locked up or had a problem and Apple somehow finds out that I have jailbroken the iPhone when I go in to have it serviced and am unable to restore the iPhone on my own. If they did not cover my warranty I don't know what I would do. I know it's a big IF, but if this did in fact happen I would be screwed. Especially after buying Apple Care, I'm not sure I want to risk it at all...