For more information on the new version of Script Editor for Mac OS X go here.
http://www.apple.com/applescript/script_editor/
Here is a list of the new features added.
Simplified easier-to-use interface
- Find and Replace in script text
- Auto-wrapping of long script statements
- Multiple undos
- No 32K limit on script size
- New Dictionary Browser with color coding and grouped events & classes
- Application scriptability
- Contextual Menu Scripts for faster script writing
- Support for Application Services