In the latest posting in his blog, Clemens Vasters gives an excellent reminder about what SOA really means for a developer or architect, and of some of its history.
But it's the pragmatism that Service Autonomy doesn't really matter under the hood because behind the service boundary is a private domain and "none of your business" to the outside world.
Finally, he makes some good points about caching, and particularly about passing forward cache validity information along with the data so that a client of a service can make an intelligent caching decision.
All well worth keeping in mind when, as I, you're building a large distributed system - find it here.
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