Hello. I bought the academic version of Microsoft Office 2004 for Mac few years ago. At that time, I got a coupon to get an upgrade to Office: Mac 2008 with Expression Media at a very low cost (around US$20 as far as I remember). Anybody knows if I can upgrade to Office 2011 for Mac at a low cost again? I cannot find such information on Microsoft website. I emailed them but did not get concrete answers. I hope we don't need to pay for the full version. Thanks.