Looks like ThinkNext have their hands on a copy of the 6780 (M3) build of Windows 7 and have show much more of Windows 7 than we have been able to see recently.
You can view them here. The screenshots have now been taken down by Microsoft: http://www.thinknext.net/archives/2281.
Going by looks, not much has changed since Vista yet, however it seems a bit glassier, apart from the changes I have mentioned previously Calculator has had a face lift in what I can only say is a good move.
It looks as though the Control Panel items have undergone a change again, though in most cases they are still fundamentally the same.
Internet Explorer 8 is included, not much of a surprise there, it should be fairly complete by the time Windows 7 is out of Beta.
Most importantly UAC appears to have been toned down extensively in Windows 7, hopefully that doesn’t compromise on the security that was originally intended.
Not much info yet, however they intend on releasing a video soon.