Project architects need to consider the importance of how to include WebSphere® Business Integration Message Broker in a highly available configuration. This article describes how to achieve high availability through a combination of application design and use of software-based clustering of queue managers using MQ clustering and machine clustering provided at the hardware level.
http://www.ibm.com/developerworks/websphere/library/techarticles/0403_humphreys/0403_humphreys.html