Doesn't jailbreaking void your warranty? And then there's this quote: Every iPhone update from iTunes disables Jailbreak. Every time Apple comes out with an update for iPhone, they find a way to prevent hackers from cracking the code again. Hackers then scramble to Jailbreak the iPhone again and release the new methods. That means if you like to download Apple’s iPhone updates, you are going to have to figure out each time how to Jailbreak your iPhone yes again. Do you really want to play this cat and mouse game? http://www.appleiphonereview.com/iphone-tutorials/iphone-jai...

And this: http://consumerist.com/2009/07/apple-argues-jailbreaking-iph...