Liferay 6 introduced really great feature: build-in support ofr  workflows. It is possible to plug-in any workflow engine and use it via  unified Workflow API. Unfortunatelly, but default it ships with own  workflow engine or jBPM3 support - which is quite outdated.

Today I happy to announce jBPM 4 (based on latest 4.4) support for Liferay: http://www.emforge.net/web/jbpm4-portlet/blogs/-/blogs/jbpm4-based-workflow-engine-is-implemented-for-liferay-6-0-5

I hope it may be useful for anybody in jBPM community, who also using Liferay as their portal solution.