In most application landscapes services tend to pop up like mushrooms, with little to no attention being devoted to decent service design or decent service-oriented architecture (SOA). Frankly put, this means you’re doing it wrong.
In the last 5 years of my career as an enterprise architect, whenever the word "integration" came up, discussions started about the choice of an ESB (Enterprise Service Bus), SOA (Service Oriented Architecture), FTP or web services, SOAP or REST, XML or JSON, etc.
In short, when involved in discussions about "integration", one most likely finds himself drowning in a multitude of technical acronyms and technological standards.
I compare the technological side of integration to the "Dr. Jekyll" personality : it is the side well-known to everyone, stable, under control and increasingly complying to uniform standards.