Though Microsoft’s not officially set to let the Windows 8 Release Preview out of the bag until sometime early June, some eager folks have taken things into their own hands and leaked a copy of the build onto the internets, which will surely be popping up soon around the normal places.
The build is confirmed legitimate and is indeed the exact build that Microsoft will be releasing soon, however it’s important to note that the build has only leaked in Chinese, with little chance of being able to translate the build into English. Thus, we recommend that anyone who can wait for the official release do so. However if you’ve got itchy fingers and can’t wait, load up your favored BitTorrent and have at it.
Edit: Sources seem to indicate that while tis build is indeed legitimate and installable, it takes some playing around with to get it to install properly as the included WIM file is apparently partially corrupt.