The Magento Direcotry

Want to add a multi-stocks, production, and localized accounting to your Magento store? Then that synchronization module is for you.

This module is contributed by the Smile French IT company:
http://www.smile.fr/

Warning, OpenERP, and a deep understanding of how it works are required to use that module, see:
http://www.openerp.com/

Features overview:
1) Product catalog upload from OpenERP, with product category and tax category synchronization.
2) Sale orders export from Magento to OpenERP, with customers and their adresses synchronisation; sale order status update.

Details here:
http://code.google.com/p/magento-openerp-smile-synchro/