I was one of the first people to reverse-engineer the binary Word file format and was one of the early contributors to POI.I've spent a career writing code against various file formats.<p>Unfortunately, most of the comments here are not based on first-hand technical knowledge. How many of you have tried to code against the OOXML spec? I have. It's pretty good.<p>Most people in the community of "people actually doing stuff in this area", which Miguel is a part of, feel like Microsoft is acting in good faith. See <a href="http://www.opensource.org/node/351" rel="nofollow">http://www.opensource.org/node/351</a>.