I'm still brainstorming how it should all come together, but for the most part I've got a decent xml- and make-based website framework. Webpages are written in pure XML/XHTML and HTML is created using XSLT. The whole website is managed with simple makefiles so when I change one thing, I can simply type 'make' and it republishes itself. Ideally, this would be done by a cronjob so updates simply publish themselves.

I've posted more information about it on the new site, check it out:
http://www.csh.rit.edu/~psionic/new/ (this url no longer works)

Hurray XML!