If you have been beta testing Windows Server 2008 for any amount of time you will have noticed that the build number has stayed the same at 6001. I”m not sure about the rest of the world but this always got to me when I got the latest build of Longhorn because I never knew how many builds took place since the last one I had. For those of you that like to know which build you have you can find it in the registry. Just take a look at the HKEY_LOCAL_MACHINESoftwareMicrosoftWindowsNTCurrentVersion in the BuildLabEx value. The latest June 2007 CTP has a build of 6001.16606.070619.0730.
Seeing that number makes me miss the old build increments even more!