In an InfoQ article, Boris Lublinsky discusses the main approaches to service composition, both from design and implementation point of view, and outlines the benefits of using orchestration. Topics covered include hierarchical vs. conversational composition, composition topologies, and the pros and cons of difference implementation approaches.
Event Driven Architecture (EDA) is starting to emerge as a good and viable option to build better SOAs. David Luckham recently published a 2 part paper supporting this claim and InfoQ published an article on BI & SOA demonstrating it as well.
A group of several vendors suggests a new WS-* spec that goes by the interesting name "WS-BPEL4People". Compared to WS-BPEL which deals with automated business processes, the WS-BPEL4People spec, which has been under works for nearly two years now, aims to add human workflow capabilities to SOA in general and to the recently approved WS-BPEL 2.0 spec specifically.
In this presentation, Google architect Gregor Hohpe takes a look at the architectural aspects of SOA, addressing issues such as the false sense of simplicity and the problems of established programming models.
After nearly four years, WS-BPEL 2.0, the Web Services business process execution language, has become an approved OASIS standard.
Craig and Vittorio release their Live Service Trace Viewer which is an enhancement to the one provided in the .NET 3.0 SDK. The differentiator: you can view the WCF interactions as they happen.
With the recently released public review draft of the WS-BPEL 2.0 specification, an interesting debate has started about the relative merits of BPEL in general and issues surrounding portability, interoperability, and compatibility.