http://blogs.msdn.com/ericwhite/archive/2009/07/02/binary-to-open-xml-translator-and-freeform-shapes-in-the-office-drawing-format.aspxThe interoperability team here at Microsoft has posted about a C# SourceForge open source project that converts from binary documents to Open XML. The blog post indicates that the code works with Mono, so it provides some level of portability across operatingenCommunityServer 2.1 SP1 (Build: 61025.2)