I have to agree. The changes they made for 2003 took some getting used to, but were a good step forward, but 2007's new ribbon interface is very nicely thought out and designed. In reality pretty much everything works just as it always has, but they have moved the controls away from fiddly menu systems and dockable icon bars and have instead made it much more intuitive with everything being accessed via a single tabbed icon bar (the ribbon) that alters it's function to suit what you are currently doing, which works very nicely and does speed up what you are trying to do.

As Submeg said, it only takes about an hour to find everything again and where it has all been moved to and rearranged, but once you have had a play around it works very nicely.