I've released the 0.0.3.1 version of org-trello in marmalade.

Features:

- installation through emacs 24's package repository (marmalade, melpa)

- setup routine to install key and token relative to trello (once)

- setup routine to attach an org-mode file to a trello board (once per org-mode file)

- synchronize entity (card/checklist/items) partially or completely

- synchronize deletion of entity from org-mode buffer and on the trello board

- synchronize full org-mode file to a trello board

- synchronize a full trello board to an org-mode file

- create a board directly from an org-mode file

For more informations, here are some links:

- github repository - https://github.com/ardumont/org-trello/blob/master/README.md
- marmalade release - http://www.marmalade-repo.org/packages/org-trello
- an article (with demos in video) - http://adumont.fr/blog/?p=1247

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