Source -If you’ve been one of the lucky ones chosen by Microsoft to host a Windows 7 Launch Party, aside from the Windows 7 Napkins and Balloons, you will now have something else to show off at your party. You will receive a limited “Steve Ballmer” edition of Windows 7! Basically its Windows 7 Ultimate but this special edition of Windows 7 will sport new fancy looking packaging and have Steve Ballmer’s signature on it.
Windows 7 "Steve Ballmer" Edition | Windows 7 News