Throughout the months leading up to the BRM and then following it, there was discussion over the future maintenance of the specification. Rather than recapitulate the results of the last SC 34 meeting, let me just point you to Alex Brown's blog. For those of you who were not following all of the players so closely - Alex was the convener of the ballot resolution meeting.
I still hear patently untrue claims that MS controls Open XML - this wasn't true following the adoption of Ecma 376, and is now permanently a moot argument. Alex's blog title says it all:
Does anyone know if the commercial interests in control of ODF would be willing to take the same step?