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 Unfortunatelly, but default it ships with own workflow engine or jBPM3 support - which is quite outdated.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 happyto announce jBPM 4 (based on latest 4.4) support for Liferay: http://www.emforge.net/web/akakunin/blogs/-/blogs/workflow-and-reports-in-liferay-6
I hope it may be useful for anybody in jBPM community, who also using Liferay as their portal solution.