Well, scratch that. We need the apache module mod_include to resolve the server side include directives in the pod html pages. However, there seems to be some conflict between mod_include and the dav_svn module that handles subversion requests - loading mod_include in the apache config wrecked svn commits, so I had to disable it (and therefore take down the pod docs).
So, we're looking into this. I'll let you know when the pod docs are up again. (In the meantime, of course, you can also view the pod directly from the source files.)