a little info on the OOXML issue ...
About OOXML:
Office Open XML (commonly referred to as OOXML or Open XML) is an
XML-based file format specification for electronic documents such
as memos, reports, books, spreadsheets, charts, presentations and
word processing documents. The specification was developed by
Microsoft as a successor of its binary office file formats ...
http://en.wikipedia.org/wiki/Office_Open_XML
This is a NO OOXML campaign website http://www.noooxml.org/.