Office 2010 is now available for Windows (xp, vista, 7) on both 32bit and 64bit from department software warehouse. It is currently available from \\\\\\winsww\sww\public\office\2010.
If your machine is not in the eecs domain, you will have to type in \\\\\\winsww.eecs.berkeley.edu, type in your credentials, and then you can go into each folder to download it.
A limited number of DVDs are also available to loan-out from IRIS Helpdesk in 395 Cory Hall.