Bought the TF300 about three months ago. Got the JB update a few days ago. Didn't think I would miss Flash but there are still a lot of sites that use it when embedding video and that's a drag - especially when the videos have to do with using the OS and other features! I have never rooted a device and wonder about where to find good step-by-step instructions for backing up the ROM and adding Flash to my tablet. Thanks!