We've told you recently that buyers of Office 2007 will get a free upgrade when Office 2010 ships, and we've often noted student discounts on Microsoft products. Reader Chris W points out you can connect the two for a super-cheap Office deal.
Eligible students can purchase a copy of Office 2007 for $75 via Microsoft's It's Not Cheating site, and then upgrade when Office 2010 appears for nothing. If you need Office, that's pretty much the cheapest legitimate way to purchase it.
An additional note for just-back-on-campus students: the deal we previously highlighted to upgrade to Windows 7 for $50 apparently expires at the end of March, so get organised if you fancy that discount. Thanks Chris!