Apparently something went terribly, terribly wrong on the server last week (this apparently only happens when I leave for vacation, and only when I'm in a place with no internet - how does it know that?).
As far as I can tell, the websvn integration hung, and caused apache to crash, making the svn processes compete for the newly vacant port 80, making apache fail to restart. I've never seen anything like it before. I had to kill -9 8 different processes before I could start up apache again.
At least it was only the website this time, TBA kept running throughout.