I have been hearing from folks who were in Kyoto last week attending either the JTC 1 SC34 meeting and/or the Ecma TC45 meeting. In fact, for a day, the TC45 folks played host to SC34 members to discuss the Open XML specification and the work being done on the document. From all reports I have heard so far, this was a very constructive few days for many reasons.
I'd like to point out that the Open XML convener, Alex Brown, has been blogging on the experience. If this topic interests you - it is worth reading. A few things to note from his comments: