The Academy of Interactive Arts & Sciences (AIAS) has updated its initial list of speakers for this year's D.I.C.E. Summit, adding Valve co-founder and president Gabe Newell as a keynote speaker. With its blockbuster games (Half-Life, Portal, Counter-Strike, Left 4 Dead, etc.), Source engine, and Steam digital platform, Valve has been a true innovator in the games industry. The exact subject matter of Newell's talk was not announced.

"Gabe Newell and Valve have become a force for innovation in gaming over the past a decade, creating some of the best-selling games of all time and a ground-breaking platform for PC entertainment," said Joseph Olin, president of the Academy of Interactive Arts & Sciences. "His perspective and vision of the games industry are a welcome addition to this year's D.I.C.E. Summit, and will greatly contribute to the high-profile line-up."

D.I.C.E. is set to take place at the Red Rock Resort in Las Vegas, February 17-20, and will feature presentations from numerous industry leaders. Here's who's been announced so far:

Dan Bilson, THQ.
Chris Cao, Sony Online Entertainment
N'Gai Croal, Newsweek
Michael Denny, Sony Corp. EU
Anita Frazier, NPD Research
Julianne Greer, The Escapist
Lars Gustavsson, D.I.C.E. Studios/EA
Michael Haigh, SCE Worldwide Studios
Mona Hamilton, Capcom
Rich Hilleman, Electronic Arts
Todd Howard, Bethesda Studios
Geoff Keighley, Spike TV
Alex Laurent, LucasArts/ILM
Ralph Osterhout, Serial Inventor
David Perry, Acclaim Entertainment
Ted Price, Insomniac Games
J. Paul Raines, Gamestop
John Riccitiello, Electronic Arts
Seth Schiesel, New York Times
Bruce Shelley, Ensemble Studios
Mike Snider, USA Today
Jun Takeuchi, Capcom
Chris Taylor, Gas Powered Games