See my post 'From the horses mouth: 10.1 GM is 5G64' in the 'We will dedicate bandwidth for 10.1!' thread.
http://www.macosx.com/showthread.php?s=&threadid=6104&pagenumber=2
Posted on the carbon-dev list:
Subject: Build 5G64 is Mac OS X 10.1 GM release
From: Mark Turner <mark@apple.com>
To: Carbon Development <carbon-development@lists.apple.com>
Sender: carbon-development-admin@lists.apple.com
X-BeenThere: carbon-development@lists.apple.com...
