Composites are a great way to re-use existing assets in your enterprise. In this demonstration I show how composites are used to take three web applications and share data between them. I use some of the new tooling in the Composite Application Editor to have things like side shelf wiring.
I integrate a sample SAP application with eBay search and our internal IBM Blue Pages application (our corporate directory with employee profiles).
It's not rocket science but it should give you some ideas of how applications in your enterprise could be used together.
*Of course any of the tooling or UI is subject to change in the general availability release.
**Remember, I am no George Lucas so don't expect an Oscar for editing or narration.