Via this recent piece from Michael Meehan, I came across an older case case study from ING Card, which features this diagram:
Given the benefit of doubt with regards to the choice of WebSphere, this seems like a fine architecture. But it has absolutely nothing to do with SOA. Every decent multi-layered application has an architecture that separates back-end business logic from UI and control flow, and commonly introduces a façade in front of the back-end.
In my view, SOA – independently of whether it's implemented using WS-* or with RESTful HTTP – is an architecture for a set of systems, not for a single application.