Just got this message from Inside AdWords crew
"We've just asked a small group of US advertisers to start testing an updated web interface for AdWords. (If you're in the test pool, you'll see an alert when you sign in to your account.)
We're testing changes to the ways that AdWords advertisers see and manage the data in their accounts. These changes should make it easier to tackle common tasks, like navigating between campaigns and editing keywords across several ad groups. We hope the updates will give advertisers clearer insights into their ad campaigns and simpler ways to act on those insights.
To answer a common question: The updates we're testing won't affect how ads run. Bidding, ranking, Quality Score, and the other key AdWords performance fundamentals are not changing with these updates.
We've started advertiser testing very early, while we're still working on changes to the updated interface, so that we can make adjustments based on comments from our testers. That's one reason why this test group is pretty small. We'll gradually increase the number of advertisers testing the updated interface (and make it available to international testers) in the coming months. We'll be sharing more details about key features along the way.
In the meantime, if you'd like to be considered for the test, please submit your AdWords account information on our beta sign-up page and we'll contact you when we're ready to add you as a tester."