Check this article from Xbitlabs:
http://www.xbitlabs.com/news/video/disp ... 55429.html
Seems that Matrox is not spending anymore on R and D for the gaming market. Whoever was the game developer contact at Matrox has been moved to another position. This person "Omar" was responsible for support of Surround Gaming from developers. Too bad since this was a cool feature.