If you go watch the video http://www.youtube.com/watch?v=-SZzAT-S5DQ (don't complain to me about it I did not make it) you will find a url at the end there you will find an offer to get a copy of Vista Business or Office Professional 2007 for free. You will need a passport account and you can't show that you work for a Microsoft partner or if you have a MSDN licence (snip from the web site You are not eligible to receive these offers if you or your employer is a participant in the Microsoft Partner Program or the Microsoft Developer Network).

Have fun and get it while the getting is good.