There’s a new article on IBM developerWorks from Message Broker guru / god / legend Matt Lucas (aka mqmatt)
One of the major improvements to the administration capabilities of IBM® WebSphere® Message Broker V6 is a new Java™ API that gives programmatic control of broker domains. This API, the Configuration Manager Proxy, is a direct interface with the Configuration Manager and lets applications manipulate all run-time object types used in Message Broker, including execution groups, message flows, and the broker itself.
Read Coordinated deployment in WebSphere Message Broker V6 using the Configuration Manager Proxy API.