Just a reminder… per our announcement on April 20, we will shutdown version 9 of the API on August 20.
Please make sure to migrate your applications to version 10 by August 20. You can find more information about these versions (including the release notes) at http://www.google.com/apis/adwords/developer/index.html.
-- Jon Diorio, Product Marketing
UPDATE as of Aug 7, 2007
We plan to release V11 of the AdWords API during the week of August 20. Since we understand that some of you may prefer to upgrade directly from V9 to V11, we have decided to delay the v9 sunset by three weeks. Therefore, V9 will now be sunset on September 10.