For anyone who purchased & installed office 2007 within the upgrade period, (between March 5, 2010, and September 30, 2010) the upgrade download is now available from Microsoft Upgrade.
You need to supply your Office product ID (not your product key) from the "About" on the installed Office 2007.
You are then forwarded on to create a Account if you don't already have a Windows Live one already.
You have the option of purchasing a backup CD for $21.03 ( not to sure what currency) then finally the download button, along with the NEW product key is supplied.
The download is 586MB in size.
Once the upgrade has been installed the older Product key that was used in Office 2007 is not invalid and legally cant be used.
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