I got asked the other day,  how I open Office 2007 (xlsx, docx, pptx) documents on a Windows Mobile device.

So acting as a public service,  here is the link to download the upgrade to Office Mobile.

http://www.microsoft.com/downloads/details.aspx?familyid=4B106C1F-51E2-42F0-BA32-69BB7E9A3814&displaylang=en