3 links
Event-driven services in SOA
javaworld.com
By Jeff Hanson. Design an event-driven and service-oriented platform with Mule.
Service-Oriented Architecture: Implementation Challenge
msdn.microsoft.com
By Easwaran G. Nadhan. Discusses various approaches to solving the eight key challenges companies face when implementing a service-oriented architecture.
SOA Much More Than Web Services
dev2dev.bea.com
By Steve Wilkes. Provides alternative service invocation schemes and explains why there is much more to SOA than Web Services.