Microsoft has posted the schemas for the XML file formats used by Microsoft Office 2003 including Word, Excel, and InfoPath. Ofr course the download is a Windows executable, rather than something standard like a zip file.
The first beta of Mozilla 1.6 has been posted. Mozilla is an open source web browser that supports XML, CSS, XSLT, XUL, HTML, XHTML, MathML, SVG, and lots of other crunchy XML goodness. It's available for Linux, Mac OS X, and Windows. This drop adds support for NTLM authentication on all platforms, automatic page translation feature via Google Language Tools, and ChatZilla, 0.9.48. And of course various bugs are fixed.
Antenna House, Inc has posted bug fix releases for XSL Formatter 3.0 and 2.5. Specifically these are 2.5MR5 and 3.0MR1. XSL Formatter is $1250 payware for a single user Windows license, plus another $100 if you want hyphenation support, plus royalty fees if you want GIF or TIFF support. Linux/Unix prices start at $3000.