Our AdWords API team has recently announced the release of version 13, which brings a host of changes to the API. Among the added functionalities are new reports, new geotargeting options, and the ability to retrieve Quality Scores and first page bid estimates for your keywords. For full details, please take a look at the release notes to stay up to date.
And as you update your campaigns for the holiday season, you'll now receive 20% more API units until January 15th, 2009. While you may be increasing your API usage to keep up with the busy time of year, don't forget that you can make the extra quota work even more efficiently by following these suggestions for "cutting API calories from your app" and avoiding the API holiday weight!