Adrien Louis

I suggest you an article I wrote with Marc DUTOO (from OpenWide company). This article deals with how to use an ESB for integration.
From a hard coded approach, to orchestration, we introduce various level of integration.

http://www.infoq.com/articles/louis-dutoo-esb-routing

This article I wrote show an example of a value added service built on existing services.

This case study is an online reservation system that allows you to book a flight and an hotel room for your vacations... ;-)

http://www.javaworld.com/javaworld/jw-10-2006/jw-1011-jbi.html

The following article introduces the JBI concepts that you may need to understand before using a JBI server for SOA considerations

http://www.javaworld.com/javaworld/jw-07-2006/jw-0717-jbi.html