I search for solutions in this order: Past Code, Unreal Source, Wiki, BUF, groups.yahoo, google, screaming at monitor. – RegularX
Talk:Unreal Unit
From Unreal Wiki, The Unreal Engine Documentation Site
It seems that the unreal unit directly corresponds to the centimeters in 3ds max. I jsut thought this might be helpful for anyone starting a project on UDK, not for UT3.