Regardless of what you program in and at what scale you are going to come across some form of integration, at the simpler levels the frameworks take care of almost everything but as things get more complex old solutions can get cumbersome and new ones are needed, not restricted to Java but definitely Java-centric.
This video discusses some of the existing problems and solutions in this area, starting with simple integration problems we come across every day to solutions attempted at some of the larger banks and why they failed and what worked. Finally, it will provide some new ideas to think about.
Video Producer: JavaZone Conference