If I jailbreak my phone, would still use the same 2.1 firmware? Would it be easy to update to newer jailbroke firmware when they come out? Such as 2.2 which is next month? Can I still sync and backup my data through iTunes without corrupting anything? Still buy/download apps from the official App Store? Also, what is the difference between the theming apps like Summerboard/Winterboard? Thanks (edit) Which jailbreak process is better on Vista? WinPwn or QuickPwn?