GTC 2012 in San Jose, May 14-17, 2012
Session proposals has closed but posters proposals is open until June 27, 2011. Both will re-open September 27, 2011.
From the website:
GTC advances awareness of high performance computing, and connects the scientists, engineers, researchers, and developers who use GPUs to tackle enormous computational challenges.
GTC 2012 will feature the latest breakthroughs and the most amazing content in GPU-enabled computing. Spanning 4 full days of world-class education delivered by some of the greatest minds in GPU computing, GTC will showcase the dramatic impact that parallel computing is having on scientific research and commercial applications.
BTW, hundreds of hours of video is available from GTC 2010 at this website.
If you are concerned with scaling topic maps and other semantic technologies or just high performance computing in general, the 2010 recordings look like a good place to start while awaiting the 2012 conference.