Read original post by Mary Jo Foley at ZDNet
Tami Reller, Corporate Vice President of Windows, told partners attending Microsoft's worldwide partner conference in Toronto that Windows 8 is on track to be released to manufacturing the first week of August, and to be generally available by late October 2012.
Update: This also means that Windows Server 2012 will be released to manufacturing by the first week of August. But the server bits won't be available to customers until September, a July 9 post on the Windows Server blog confirms the RTM date.