Windows 7 Ultimate has been cracked and activated via OEM instant offline activation. Other editions of the operating system have yet to get the same treatment.
Full Story: http://arstechnica.com/microsoft/news/2009/07/windows-7-ultimate-activation-cracked-with-oem-master-key.ars
Full Story: http://arstechnica.com/microsoft/news/2009/07/windows-7-ultimate-activation-cracked-with-oem-master-key.ars