The IBM MQ Series Family home page contains lots of information and links related to MQ. You can also find articles describing how some customers have implemented MQ Series.

MQSeries Messaging simplifies the process of connecting your applications across unlike environments; currently there are approximately 35 platforms supported. The programs communicate by passing messages using the MQSeries API. See IBM's Messaging page for more details.

MQSeries Integrator is a real-time, intelligent rules-based message routing and
dynamic message content transformation and formatting system that allows you to integrate all types of applications and systems into robust, flexible and scaleable information. See IBM's MQ Integrator page for more details.

MQSeries Workflow helps organizations define, document, test, control, execute,
improve and integrate their business processes, with the assured information delivery of MQSeries. See IBM's MQ Workflow page for more details.