Duane Nickull, OASIS SOA-RM chair and Senior Technology Evangelist at Adobe, has announced that they have just released a new white paper covering specialized message patterns for SOA. As Duane says:

The paper looks into specialized messaging patterns for Service Oriented Architecture (SOA). Most people still mistakenly believe that SOA is limited to request-response. Such is far from the truth as most standards work on SOA now recognizes alternative patterns such as subscribe-push and probe-match.

Duane discusses a close relationship between Web 2.0 and SOA:

... Web 2.0, is not defined as a static architecture. Web 2.0 can be generally characterized as a common set of architecture and design patterns, which can be implemented in multiple contexts. The list of common patterns includes the Mashup, Collaboration-Participation, Software as a Service (SaaS), Semantic Tagging (folksonomy), and Rich User Experience (also known as Rich Internet Application) patterns among others. These are augmented with themes for software architects such as trusting your users and harnessing collective intelligence. Most Web 2.0 architecture patterns rely on Service Oriented Architecture in order to function.