From DeveloperWorks, Getting Started with IBM WebSphere Business Services Fabric V6.1:

Draft Redbook, last updated: Tue, 11 Mar 2008

– Discover the value of composite business applications
– Model, assemble, and deploy Fabric solutions
– Learn by example with practical scenarios

WebSphere Business Services Fabric (Fabric) is a comprehensive SOA offering that is designed to extend IBM’s business process management platform to deliver flexible composite business applications.

Everything you need to know about Fabric in one simple book. Finally.