Moments ago, ISO issues a press release: Vote closes on draft ISO/IEC DIS 29500 standard:

A ballot on whether to publish the draft standard ISO/IEC DIS 29500, Information technology – Office Open XML file formats, as an International Standard by ISO (International Organization for Standardization) and IEC (International Electrotechnical Commission) has not achieved the required number of votes for approval.

The five-month ballot process ended on 2 September and was open to the IEC and ISO national member bodies from 104 countries, including 41 that are participating members of the joint ISO/IEC technical committee, JTC 1, Information technology.

Approval requires at least 2/3 (i.e. 66.66 %) of the votes cast by national bodies participating in ISO/IEC JTC 1 to be positive; and no more than 1/4 (i.e. 25 %) of the total number of national body votes cast negative. Neither of these criteria were achieved, with 53 % of votes cast by national bodies participating in ISO/IEC JTC 1 being positive and 26 % of national votes cast being negative.

Full announcement