** replacing a table
   :PROPERTIES:
   :DATE:     2011-08-19
   :END:
#+name: this-is-the-table
| 1 | 4 | 7 |
| 2 | 5 | 8 |
| 3 | 6 | 9 |

#+name: this-is-the-table
#+begin_src emacs-lisp :var table=this-is-the-table
  (mapcar (lambda (row) (mapcar (lambda (cell) (* cell 2)) row)) table)
#+end_src