Back in 2002, artist Phil Toledano did a photo series of the different faces gamers make while playing. Now in 2009, Sony is doing the same.
http://lastchance.cc/214568/video-game-portraits-aka-the-gamers-o+face%3C/a%3E%3C/p%3E
The PS3 Slim Sony campaign is called “Play Face” and currently features celebrities.