As someone who has developed a game for 360, I can virtually guarantee that it does.8 1/2 wrote:Does online support voice chat?
When developing a game using XNA: by default, in a network session, all joined players automatically get the ability to chat with each other. The programmer doesn't need to do anything to implement this; it just happens. Since voice chat is built into the 360's core system software, I see no reason why this wouldn't be the case in professionally-developed games as well.