This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
On the same host or on separate hosts? Chapters 12 and 13 talk about clustering. Chapter 15 has section 15.2, Collocating Multiple Application Server Instances, which discusses setting up multiple instance on a single host. In addition, section 15.6.2, Registering Multiple Services, answers the common question of how to do host binding when running JBoss AS as a Windows service.