Like my colleague Phillip Calcado says, SOA is really like DDD at larger scale. An illuminating read indeed.
I can understand the idea of linking SOA and DDD, but I'm not sure I think SOA is really DDD at a larger scale.
In fact I think one reason that SOA is DDD at a larger scale is an attractive statement is that nothing written in the SOA space is of the quality of DDD, the ideas might be there but they aren't as clearly expressed as Evans managed.
Personaly I'd far rather talk about good business-focussed SOA (Steve Jones style perhaps) and then dig into the domain models. In doing so we might take some ideas from DDD directly (UL) and we might use other ideas to shape/describe our services (context maps/bounded contexts/etc) but I'm still hoping someone steps up and writes a similiar book about SOA some time soon.