I think Rob Weir and I (as well as many others) have made it clear in the last few months why we think the OpenDocument Format ISO standard is vastly superior to the Open XML spec. ODF is what the world needs today to drive competition, innovation, and lower costs for customers. It is an example of a real open standard versus a vendor-dictated spec that documents proprietary products via XML. ODF is about the future, Open XML is about the past. We voted for the future.