Looking for SSI speaker

I'm the course coordinator for the space colonization curriculum
at Penn State University. I'm also on the planning committee for
university's Frontiers of Science lecture series (public talks about
topic in science). For the 2002-2003 school year, we plan on
having a series of lectures on space colonization. We used Dr.
O'Neill's book The High Frontier in one of our space colonization
courses, and it would be great to have a representative of SSI
give a talk about Dr. O'Neill's work and SSI's mission as one of
the space colonization series speakers. I dropped a note to
inquire about this, using the email address provided on the SSI
website, but I have not received a reply. Does anyone have a
better email address or know the right person to contact at SSI
about this? Thanks.