According to the folks at the My Digital Life forum Microsoft will be handing out Build 81xx of Windows 8 to developers at BUILD in Anaheim tomorrow.
Unlike previously however it is also believed this software will also be made more widely available, with the official BuildWindows8 account tweeting:
“… getting the pre-release bits …. will be easy and not a secret”
Hopefully what will be released will also be pretty fully featured, to give us a clear idea of what to expect when the OS is released towards the end of next year.