Yesterday, Microsoft announced that Windows 7 and Windows Server 2008 are Released to Manufacturing.
Unfortunately, the ISO’s are not avaliable for download at the moment through MSDN/TechNet or any other Microsoft source. For specific release dates check the Windows 7 Team Blog and the Windows Server Division Weblog.
In General, Windows 7 will be available to download starting August 6th (Partners and OEMs) and Windows Server 2008 R2 starting July 29th (OEMs). In the following weeks after, Windows 7 and 2008 R2 will be available to download in more languages to other customers.
Check out the announcements: