In David Linthicum's "Real World SOA" column last Thursday, he talked about "Why you should extend your SOA for Inter-company integration". He says that:
"In essence, you're creating a virtual set of applications that exists between trading partners that allow those trading partners to function like a single entity, and thus service common business processes as if they existed in a single company"
Good short article. However, it didn't mention security and I think security is the enabler for the kinds of inter-company integration which he describes. I tried to post a comment onto the article to talk a little bit about a real-life case study of one of our customers who is using XML for inter-company integration [i.e. an example of a "Real World SOA"]. However, I guess because I'm from a vendor, my comment didn't "stick" on the Infoworld site - hence my post here instead.
There is also a lot more information about real-life cross-partner integration in this joint Vordel, Intel, and Microsoft Secure Partner Integration solution :