UML deployment diagrams examples - web application deployment and manifestation diagrams, clustered deployment of J2EE web application, Apple iTunes, etc.
Chapter 4 Deployment Scenarios (Sun Java System Web Server 7.0 Update 2 Administrator's Guide)
Deployment Diagram Head Office Servers Using Images | Enterprise Architect Diagrams Gallery
web development - Drawing the conceptual architecture of my web application in simple steps - Software Engineering Stack Exchange