Playa Vista-based X PRIZE Foundation, the group which runs the prize-based innovation competitions, said this week that it has added filmmaker James Cameron to its Board of Trustees. The group--which was behind the Ansari X Prize, which spurred the development of the first, commercial spacecraft--said Cameron joins such notable as Dean Kaman, Dr. J. Craig Venture, Elon Musk, Ray Kurzweil, Anousheh Ansari, Larry Page, and Arianna Huffington on its board. Cameron is known for Avatar, Titanic, Terminator, Aliens, and The Abyss.