I have never jailbroken before and am considering it now that it's legal and out for the iPhone 4. When I jailbreak it, will everything be exactly the same as before? (apps, contacts, SMS, etc). Because there are some cool things out there but I don't want to lose everything and start over. Also, if I am unhappy I can restore it on iTunes right? And will I have ios 4 or ios 4.0.1?