I am Luc Moreau from the University of Southampton, and I am the other co-chair of the working group. I have had a long-standing interest in provenance and open specifications for provenance.
I was PI of the Provenance Aware Service Oriented Architecture project (PASOA, http://www.pasoa.org/), and architect of the EU Provenance project (www.gridprovenance.org), where we produce a first open specification for provenance. Based on this experience, I initiated the Provenance Challenge series (http://twiki.ipaw.info/bin/view/Challenge/), which led to the design of the community-based Open Provenance Model (OPM, http://www.openprovenance.org/). I was also involved in the W3C Incubator on Provenance.
For further details, see my page http://www.ecs.soton.ac.uk/~lavm/
I look forward to working with you all in defining an important standard for the Web.
Best Regards, Luc