You want to get a rise out of a group of developers? Tell them you see no difference
between Open Document Format (ODF) and OOXML, since both simply map the features
and functions of their respective, underlying Office application suites, OpenOffice
and Microsoft Office.

Yeah, I can feel the hate mail already.

The overall document summary:

Industry debate about the relative
merits of OpenDocument Format (ODF) and Ecma 376 Office Open XML (OOXML)
highlights the significance of the productivity application market shift from
binary and proprietary file formats to vendor- and product-independent
Extensible Markup Language (XML) models. The competitive stakes are huge, and
the related political posturing is sometimes perplexing. In this overview,
Research Directors Guy Creese and Peter O’Kelly introduce ODF, OOXML, and
related World Wide Web Consortium (W3C) standards, and project their
implications for future productivity applications.