Jordi Massaguer Pla has just published the connector that allows Openbravo ERP and eZ Publish to interoperate.
To integrate Openbravo with an e-commerce solution has been a common request from our community that can now be accomplish using eZ Publish.
In the eZforOb project page you have the file for download and all the technical details and instructions explaining how to install the solution. The integration is done using Openbravo web services.
The work has been done by Opentrends that kindly have make the effort to polishing the integration and publishing it. This work is publish as "it is".
Update: Jordi has published some documentation about this integration.