Finally, he will be presenting at a Energy and Sustainability Conference at the University of Delaware on Saturday, September 25th. See the conference website for details (note that there will be a lot more sustainability-based topics covered in the conference as well): www.energy-sustainability-2010.com.
Toby Hemeway is a world-renowned permaculturalist, especially home-scale permaculture. His book Gaia's Garden: A Guide to Homescale Permaculture has been the best-selling Pc book for the past 6 years. This is really a great opportunity.