Yes, sorry about that. We've been rather slammed today. The short answer is that we don't support it. We could if we were just using LaTeX => PDF (which we do)

Yes, sorry about that. We've been rather slammed today. The short answer is that we don't support it. We could if we were just using LaTeX => PDF (which we do), but then things would blow up when doing epub and mobi. I'll take this as another vote for the feature, though :).