I loved the appearance of the tape on Outlook (attention outlook is not delivered with the family version, and student).
Also note, the ability to paste directly into Word captured images on the fly in another window without having to go through paint or other editing software. It's a real time saver. Besides, the function of bonding preview is also very useful.
Finally, it seems that the online functionality is very rich (sharing advanced materials, accessibility of the office suite via a web browser (including Safari), but it will ensure their fluidity.
In short, Office 2010 seems like a good evolution of 2007, but the transition will be much less brutal for most users than it had been between 2003 and 2007 versions.