This is what I told them:
Due to the impacts of biotechnology, genomics, and nanotechnology, the process of human aging will undergo a fundamental transformation in the first half of this century. It's a good thing someone has initiated a forum for discussion of these topics.
As for your proposed session on the medical and aging aspects of nanotechnology from a science and policy perspective, there are at least two ways you could approach this. The first approach would be simply to consider how nanomedicine may affect aging and healthspan extension, and what policy choices may influence the development and availability of such techniques. But there's a deeper and more meaningful approach, which is to consider how public debate over the environmental, military, and economic impacts of advanced nanotechnology may hinder or disrupt the availability of aging ameliorative nanomedicine.
I've labeled the second approach as more meaningful because I'm convinced that in the real world, the development of benefits to slow, stop, prevent, or reverse aging hinges on our success in surviving the earlier stages of nanotechnology. This is a big topic, perhaps too big for a single session, and also hard to explain in a short email. But anyone seriously evaluating the implications of this technology for our society must try to take a broad view, since everything is interrelated.