It looks like Microsoft has updated their Office 2007 information site with some new screenshots. They appear to have made everything a little more streamlined and slightly more graphics oriented.
I have been using the Microsoft Office 12 (now Office 2007) for months now and I am very amazed at how well this beta performs. The only thing that does not work to its full potential is when you try to create certain charts in Excel. The charts may be generated properly but it is extremely difficult to adjust the properties (such as the axis interval).
At any rate, Microsoft Office 2007 is going to be as amazing as the release of Windows Vista. Both of these new releases by Microsoft will take some time to get use to but it is actually enjoyable playing around with them.
News Source: Microsoft Office Online