When it comes to the evolution of Windows Vista's successor, Microsoft is as silent as it has always been with the products that haven't been officially unveiled. We're all aware of the work on a soon-to-arrive Service Pack 1 for Windows 7, but the few details emerged on the new flavor of Microsoft's client arrived from third-parties, and not from the software giant itself. Even so, these various sources have pointed not too long ago towards the possibility that
the first external test builds of Windows 7 SP1 will be delivered very soon, and it seems that this will pan out earlier than expected.
Full read plus screenshots:
Windows 7 SP1 Screenshots Emerge - A public Beta in July, final version in September - Softpedia