** name src_emacs-lisp{org-current-export-file}
   :PROPERTIES:
   :DATE:     2012-01-20
   :END:
Fanciness with running code in header arguments.

One block to tangle.
#+BEGIN_SRC emacs-lisp :tangle yes
  (message "I am tangled")
#+END_SRC

One block to export.
#+BEGIN_SRC emacs-lisp :exports results :var foo=(org-babel-tangle)
  (message "I just tangled %S during export" foo)
#+END_SRC