The Massachusetts Institute of Technology (MIT) is putting a lots of lectures and conferences online in audio and video form. One of them is Science and Technology for a Clean Energy Future. The 5 panelists talk about: The solar & wind industry, battery technology, cellulosic biofuels, nuclear fusion and the possibilities of nanotechnology. They don’t have time to go very deep into each subject and cover everything, but they give a good overview of the current state of the art and what is currently being worked on.
If you want to skip the introduction (which doesn’t contain too many exciting things), forward about 14 minutes into the video. MIT: Science and Technology for a Clean Energy Future. See also: ::Video: Past, Present and Future of the Solar Industry, ::William A. McDonough Conference from 2000