Having been involved in a couple of REST v WS discussions recently, I've decided that not only does Dark SOA really exist, it is actually more like a black hole than Dark Matter. We all talk about business agility and flexibility, but then start arguing over the technology and pretty much forget about the business side of things in a mistaken belief that technology is what they wanted in the first place.
This attractive force of desiring to focus on technology rather than the business is really damaging to getting SOA delivering on the promises, its really creating a black hole into which IT people continue to fall while still protesting that everything is fine.
If SOA is technology then its another TLA and another black hole down which money and broken promises are thrown. And while its kind of interesting to watch these projects and ideas fall to their deaths and be compacted down on top of the previous generations of IT to form a super dense impenetrable IT estate, this time with XML as well, its not much fun when I realise that I'm probably going to have to work at some of these companies at some stage in my career.
Technology SOA is Dark SOA, its black hole creating supermass that brings everything down with it.
The clue is in the question folks, want business agility? Focus on the BUSINESS