Microsoft Office 2007 File Formats

Ya, they are in XML and pretty small actually. I had PPTX and DOCX files which are about 5-10% of those of 2003 formats.

anyway, I found that there is a way to read / write to the 2007 formats. Just read this and install the pack :

http://www.microsoft.com/office/preview/beta/converter.mspx

Now, you got no excuse cannot read my office files liao. :P