Introduction
What is an Enterprise Service Bus?Why PHP?Why Blackbird?Why Not Blackbird?
Getting Started
PrerequisitesDownloading and Installing BlackbirdConfiguring an ESB InstanceRunning and Managing
Developing With Blackbird
Basic TheoryCallback FunctionsProtocol HandlersUsing Sandpiper
Use Cases
Stock Trading Grey BoxWeb Service IntegrationSales Order Integration

Use Cases

1. Stock Trading Grey Box
2. Sales Order Integration
3. Web Service Integration

Another useful reference is the Apache ServiceMix Example & Use Cases document.