"According to a short 'Tech Informer'; article just posted at CIO.com, Ecma, the European IT standards organization on Monday may post 'as early as Monday,' the final approval draft of OpenXML, the document format specification contributed to Ecma by Microsoft in an effort to counter the momentum behind the OASIS and ISO adopted ODF. However, the earliest date upon which Ecma could hold an approval vote would be during its December 7-8 General Assembly meeting, according to the same article.
"ODF was adopted by OASIS in May of 2005, and the voting window that resulted in ODF's approval by ISO, the International Organization for Standardization, closed on May 1 of 2006..."