Mark D is still alive and well and living in Peabody MA. Sorry. No excuses for my absence. I have been spending probably too much time preparing a course in the "green" aspects of urban planning (my original career) for Tufts University (Medford MA) this coming spring.
Brooks has admittedly been hard to contact. He has come to realize that running Challenger, running his c.c. business, holding down a full-time sales job in another industry, and having a wife and a few children is more than he can sanely handle. He told me just a few days ago that he has sold a 66% interest in Challenger to 2 guys who he feels are more suited to run the business end of things, while he will stay on in some kind of technical capacity.