Event: SIGGRAPH 2004 Advanced Content for Game Developers
When: August 8-12 with an exhibition from 10-12
Where: Los Angeles

SIGGRAPH is a week-long conference taking in exhibitions on cutting-edge research, new techniques and technologies. The official website says:

"Molecular interiors, galactic visions, tomorrow’s visual effects.
Responsive machines, extra-human intelligence, alternative realities.
Code, concepts, mathematics, theories, applications.
World-class experts teach all this and more. Creative adventurers show 2004’s most advanced achievements in computer graphics and interactive techniques. And you acquire the inside data you need to succeed in this amazing industry. "

For full details of the programme: