Scoble says it would be too much work for Microsoft to add OpenDocument support to Office. Shouldn’t the debate be about whether Microsoft’s customers and the industry in general would benefit from having a single office document file format? If so, and if Microsoft is going to put in the effort to support an XML format, why not [ODF plus extensions ](http://tbray.org/ongoing/When/200x/2005/11/27/Office-XML) rather than a whole new format?