The SOA bandwagon has been trundling on for about ten years now and, if you believe Gartner (and why not?) SOA has passed the Peak of Inflated Expectations, dived to the Trough of Disillusionment, and is currently climbing the Slope of Enlightenment, on its way to the Plateau of Productivity. Industry estimates are that the journey for most companies is at least another 3 – 5 years. There are a small number of published success stories for SOA, and I am sure a large of unpublished horror stories.
