I try to find release notes for AppleScript 10.7 and 10.8.
This page list only from 10.0 to 10.6:
http://developer.apple.com/library/mac/#releasenotes/AppleScript/RN-AppleScript/RN-10_6/RN-10_6.html
This page list only from 10.0 to 10.6:
http://developer.apple.com/library/mac/#releasenotes/AppleScript/RN-AppleScript/RN-10_6/RN-10_6.html