There was a presentation "BPEL in Practice Using Apache ODE, Apache ServiceMix, SoapUI" on Warsaw Java User Group (JUG ) on 2009-11-10.
You can download materials (presentation & examples) from attachment. It's also avaliable in git repository ode-smx-jug.
The slides are also available on slideshare: ODE part and Servicemix part.
The presentation is in polish - but examples should be readable for everyone.