If you are hearing lot about the new UI (Ribbon) in Office 2007 and dying to see more of it, visit these two sites: First is Jensen Harris Blog and the second MS Official preview Page.
(Office 2007 Beta 1 Going Dark Theme – Copyright Microsoft Corporation)
MS Blogs
Seeing yet another useful blog from a MS staff, I am impressed by the new transparency Microsoft has embraced in the last two years. The single biggest way they seem to have done this is by using blog as an effective media to keep in touch with outside world. The other is their regular CTP (Community Technology Preview) builds of their upcoming software. The classic way of Beta 1, 2, 3, RC & Gold have lost their relevance in the super fast changing connected world.