RTM Mango Build 7720 Leaked On XDA
"A poster by the name of longshot442 has posted a 404MB file which contains the official RTM build of Mango aka build 7720."
The RTM version of Mango carrying build number 7720 has found its way on to the forums at XDA. It is currently unknown if there are adverse affects in installing this build via the methods described. But, then again, that's what XDA is all about. If you are feeling adventurous, head over to the XDA site for the instructions. Or if you are the cautious type, download the file first (in case it gets pulled) and wait and see reported results from other then decide if its something you want to try.