Magento has released its API
Florence SONG | October 8, 2008
It supports SOAP and XML-RPC and provides access directly to customers, orders and product catalog.
An introduction to the API: http://www.magentocommerce.com/wiki/doc/webservices-api/introduction
We expect this API for months. Now, we can integrate Magento with all professional third-party applications that revolve around an ecommerce site (ERP, CRM, Logistics, etc. ..)
