Andy,
If you haven't already done so, you may want to review the presentation / recording earlier this year about the "Dark Matter - shared drive file analysis" case study via Lockheed Martin / Nuix:
http://community.aiim.org/oilandgas/sys/viewdiscussions/viewthread?GroupId=295&MID=1490&tab=digestviewer&CommunityKey=53e9f08b-653b-49ef-b968-e3be3cb3f605
If you are interested, I can connect you to the presenter.
Best regards,
Dennie
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Dennie Heye
Business Analyst Information Management
Royal Dutch Shell