Which workflow engine to choose? [closed]

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We are currently in the process of evaluating a BPM engine and I'd really appreciate the community input. I am doing my own due diligence but would also like to hear on the suggestion based on implementation stories.

My main evaluation criteria are below

1. open source and OEM friendly license
2. production installations (success stories are a great help)
3. commercial support available
4. open standards support - BPMN
5. dynamic creation/assembly of the workflow based on input
6. embeddable

Currently I am evaluating Activiti and JBPM. Bonita open BPM seems like a good candidate as well but never used it. Do you guys have any successful deployments on Bonita?