orgtbl-to-gfm.el

;; Usage Example:
;;  
;; <!-- BEGIN RECEIVE ORGTBL ${1:YOUR_TABLE_NAME} -->
;; <!-- END RECEIVE ORGTBL $1 -->
;;  
;; <!-- 
;; #+ORGTBL: SEND $1 orgtbl-to-gfm
;; | $0 | 
;; -->

(defun orgtbl-to-gfm (table params)
  "Convert the Orgtbl mode TABLE to GitHub Flavored Markdown."
  (let* ((alignment (mapconcat (lambda (x) (if x "|--:" "|---"))
                               org-table-last-alignment ""))
         (params2
          (list
           :splice t
	   :hline (concat alignment "|")
           :lstart "| " :lend " |" :sep " | ")))
    (orgtbl-to-generic table (org-combine-plists params2 params))))