Here's a tool for integration of information systems you might have overlooked: Wiki.
I bet you're thinking that means simple project collaboration on an enterprise integration project -- though if you haven't checked out the advances wikis have made in this arena, you should. And it doesn't mean using a wiki as a project management tool, either. Nope. This is real, honest-to-open source integration.
As software developer Chad Files explains in "Use a Wiki to Integrate Your Information Systems" at IT Manager's Journal, an enterprise wiki can be the repository for support, customer feedback and documentation. Okay, fine. But then Files goes on to explain that, with a few lines of added code, a wiki can pull information from other applications and databases.
Okay, it's not going to revolutionize business. Still, talk about plucking the low-hanging fruit. It's an easy, efficient and public integration project.
And wouldn't you be just a little amused if wiki became the killer app?