AutoBlogGreen's report http://www.autobloggreen.com/2009/04/02/plug-in-ecosystem-update-gm-working-with-dozens-of-utilities-to/ includes
a long writeup and most of the presentation slides; both they and Green Car Congress at http://www.greencarcongress.com/2009/04/gm-putting-1m-plugins-on-the-road-will-require-a-plugin-ecosystem.html reproduced in full the comment CalCars provided to media after the briefing: