** I used to use VM in EMACS, worked great, highly recommend it--you could then use EMACS hooks like:
"vm-mail-hook
List of hook functions to be run after a Mail mode composition buffer has been created to send a non specialized message, i.e. a message that is not a reply, forward, digest, etc. VM runs this hook and then runs vm-mail-mode-hook before leaving you in the Mail mode buffer.
--and hook those hooks (the list of hooks is 20+ long) up to creating an OrgMode document---maybe somewhat in the way Josh suggested--e.g.: