searching for a scientific note-taking program I have discovered your fantastic org-mode package. I use latex and usually code a lot of formulas by having a lot of macros defined, e.g.,
\newcommand{\mgut}{\ensuremath{M_\mathrm{GUT}}}
Thus, e.g.: "At \mgut\ gauge couplings unify in supersymmetry."
In this regard, it would be great if one could use a customized latex preamble (additional usepackage-commands) which
might be needed for the defined macros.
Since it is all about speed in note-taking, I think such a support would be really appreciated...