When I get my Live! package today, I should be able to hook up the communicator and run the included disc to set everything up. I've already got the networking hardware set up. Here's my question: Is it possible for me to play with a buddy (or up to 4 of us total) on my XBOX with others through the Live! service? Would I have to have 4 communicators to go with my 4 controllers, or could I just use one communicator (so my 3 buddies wouldn't be able to voice chat with others, but they could still play the game)?