Ok, jailbreaking voids my warranty. But what if I restore my iPod? Will they know I've jailbroken it?
If you restore it to factory default/setting before the jailbreak. Its usually delete/remove traces of the jailbreak. Source Info : TIPS ON HOW TO REMOVE JAILBREAK ON APPLE DEVICE
Quite possibly. You can (as stated above) restore you device to factory settings, but this is Apple we are talking about. It is quite possible they are able to find out whether it is (or has) been jailbroken.
Well. I've updated Redsn0w to the latest. Also, there is no 5.1 jailbreak so do not update. When there is one released, go ahead, but remember to do it via iTunes and not the updated on the iPhone, iPad, iPod Touch.
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