Phase III of the b2xTranslator project mainly focuses on Excel and PowerPoint improvements. See http://b2xtranslator.sourceforge.net/ for more details.
Phase II of the binary translator for Word documents (doc to docx) has been finished. The latest version has been extensively tested and offers a number of new features.
M2 features a comprehensive doc/docx translation and provides for some basic xls/xlsx and ppt/pptx feature mapping.
The first snapshot of the Structured Storage Reader is now available here http://b2xtranslator.sourceforge.net/snapshots.html