Technet subscribers: August 6 in English, October 1 remaining languages
MSDN subscribes: August 6 in English, October 1 remaining languages
Software Assurance (SA) customers: August 7, remaining languages a couple of weeks later
Microsoft Partner Network (MPN): August 16
Volume License customers without SA: September 1
Consumers: October 22
I have MSDN subscription, that means I’ll get my copy very soon . I think both of these products are awesome (I use Windows7 in production environment from beta version for about half year), and I think they are going to have huge success.