FYI, Microsoft has released converters for Office 2007 files. The new
file format uses the XML file format and has "x"tended extensions
(e.g. *.docx, *.pptx). I've been getting some docx files as PC users
upgrade to Office 2007. Here is the download page:

http://tinyurl.com/3ysg57

At 24+ Mb, it's bloated compared to 3rd party utilities:

http://www.apple.com/downloads/dashboard/calculate_convert/docxconverter.html

Alex