Hi Tom,
I'm also using vaadin. Currently i'm looking for a way to integrate jbpm 5.3 in my app using spring. I want to use jbpm to manage workflows. I used jbpm version before in a spring managed webapp. But jbpm 5.3 differs totally from version 3 and there is no example of how to integrate 5.3 with spring.
I have in my own way integrated spring with vaadin so that it resembles a swing app.
Maybe we can form a group to storm the developers in creating an spring jbpm integration example.