Instructions
Plug your PlayStation Eye camera into the USB port on the front of your PS3 console, then turn on your PS3.
Navigate across to the "Settings" option of the menu in your PS3 home screen and press "X" on your controller to select it. Scroll down to "Accessory Settings," and press "X."
Select "Audio Device Settings" and then select "Input Settings."
Select the option that says "USB Camera" and press "X."
Tap the "O" button until you return to the main menu on your PS3 home screen, then start your game. The game will now recognize your PlayStation Eye as a microphone and you can communicate in game with other players.