Is there anyway to backup app data, but restore as a new iPad? Reason I ask is when 4.2 comes out I would like to do a clean install rather than upgrade since it's such a big OS jump, but (as sad as this is) I really would like to save my plants vs zombies saved games (sad I know). Anyway to do this? Or is upgrade/restore from backup my only option? I did some google work but couldn't find an exact way/answer, thanks!