What's new in Office Mobile 6.1? The ability to view Office 2007 documents. (eg. pptx, xlsx, docx). Other improvements include:
• Enhanced viewing experience for charts in Excel Mobile.• Ability to view SmartArt in PowerPoint Mobile.• Ability to view and extract files from compressed (.zip) folders.
Download the upgrade now : http://www.microsoft.com/downloads/details.aspx?FamilyID=4b106c1f-51e2-42f0-ba32-69bb7e9a3814&DisplayLang=en