I've been experimenting with XML and XSLT lately. I've taken the examples from the Gentoo Linux web site and adopted my own XML schema. I plan to use it for internal department documentation.
I still have qualms on whether it's easy to use. Will the system administrators actually use the XML format, or will plain-text be more efficient? Given, the XML format will offer more flexibility in the future, but sometimes, it's easy to waste time with formatting XML.
Just my own two cents...