I may be a little late on this but I only just spotted the link in Google Webmaster tools allowing you to check out the new interface layout. Not shockingly different to be honest but nice and… I guess Open or Fresh might be the right words to describe it. If you using Webmaster Tools you can jump in and check it out Im sure, just look across the top of the screen for:
We’re changing! Check out our new look!
And its all yours.