Dave Linthicum is blogging about orchestration and gets it mostly right.
The blog entry does a decent job of describing orchestration at a high level - if you're unfamiliar with orchestration the blog entry is worth a read. The following, however, made me recoil a bit (emphasis is mine):
Orchestrations may span a few internal systems, systems between organizations, or both. Moreover, orchestrations are long-running, multi-step transactions, almost always controlled by one business party, and are loosely coupled and asynchronous in nature.
Dave's definition confuses orchestration with choreography. Put more simply. orchestrations are intra-organization while choreographies are inter-organization. Put even more simply, one organization does not orchestrate another.