Microsoft has released the Service Pack 1 Beta of Windows 7 to testers.
This beta Service Pack 1 is released in English, German, Japanese, French and Spanish and its size is 1.22GB.The full build in number of this beta version is 7601.16562.100603-1800 which tells that it was complied on 3rd June 2010.
If you dont get this testing version then dont worry because Microsoft is planning to released SP1 Beta to public by the end of July