This is a extension of Emacs that provide auto-complete sources for org-mode.
You'll be able to use auto-complete as substitute for pcomplete which is bound to M-TAB.

2014/03/02 It's available by using melpa.

2014/03/03 It's available. But, master branch only.

(auto-install-from-url "https://raw.github.com/aki2o/org-ac/master/org-ac.el")

• In this case, you need to install each of the following dependency.

Download org-ac.el and put it on your load-path.

• In this case, you need to install each of the following dependency.

(require 'org-ac)

;; Make config suit for you. About the config item, eval the following sexp.
;; (customize-group "org-ac")

(org-ac/config-default)

• Emacs … GNU Emacs 24.3.1 (i686-pc-linux-gnu, GTK+ Version 3.4.2) of 2013-08-22 on chindi02, modified by Debian
• auto-complete-pcmp.el … 0.0.1
• log4e.el … 0.2.0
• yaxception.el … 0.1

Enjoy!!!