http://www.google.com/adwordseditor/releasenotes.html

Version 4.0 includes support for mobile ads, the ability to post changes to selected campaigns, custom date ranges for performance statistics, and the ability to update negative keywords along with your regular keywords. You can read the release notes for a list of all the changes in version 4.0.

With the release of version 4.0, AdWords Editor is now available in 23 languages. The six new languages for version 4.0 are: Czech, Hebrew, Polish, Portuguese (Portugal), English (Australia), and Turkish.