Google has released version 6.0 of the Google AdWords editor yesterday. One of the notable features recognized by forum members is the ability to drag and drop groups within tree view. The downside to this drag and drop feature is that the history of old ads won't be migrated to the new group.
As always, AdWordsAdvisor encourages you to export and archive of your account in case there are any problems.
By the way, to take advantage of the new features, Google is holding a webinar next week on June 10th from 10:30 until 11:30 PDT. You can sign up if you are interested.
Forum discussion continues at WebmasterWorld.