Great show, klaatu! In my previous career as a Project Manager working with big data systems, XML was important for data transfer. For example, in the automitve industry the major manufacturers would insist that suppliers use XML to send data (such as invoices; important!). And in health care it is useful for sending health data.

Also, you mentioned DocBook, and I seem to recall seeing you give a presentation on that, and I think it was at Indiana LinuxFest, but if not, probably Ohio LinuxFest. All good stuff.