Most companies have a deal like this too. If you have an email address with companies that have this setup, you go to microsoft's website, give it your work email addy and it emails you instructions. I've worked for about 4 companies that all had this deal with them. I think I paid $10 for Office?
Here is the link:
http://www.microsofthup.com/hupus/ho...?culture=en-US