Hey ppl, i hav some qns here.... Hope ppl can help me. Thx ! 1.) What changes were made in the 2g 2.2 firmware ? 2.) If i update 2.1.1 to 2.2, will it affect e jailbreak process in e future ? Can i simply restore back to 2.1.1 ? 3.) If i update iTunes software,e music library will be gone. How do i backup ?