Ok, I see my post begging you to buy the PS3 was a lil too late.
And again, I'm LOL-ing at xbox 'tech support' not telling you that the headsets are absolutely worthless without live.
Let me also share something else with you that's going to piss you off cuz I learned it the hard way.
You and your son with both need seperate xbox live accounts if you both want to play online at the same time, and talk to one another thru the headsets.
Now ain't that a bish?!
Hopefully you have all your packaging, and can take the thing back. Cuz the more I played, the more I regretted not going with the PS3.