Well Greg I'm going to have to disagree with you on this one. Playing Ghost Recon at work doesn't really contribute any training value at all in my eyes. You can't really do too much in terms of coordinating thought out attacks, defenses or anything of the like with a Tom Clancy game, whereas the FATS/SATS trainer does a lot more for training value. ie; Marksmanship principles (which are always good to work on as much as possible) ROE training, and section based operations with real weapons. Sure the graphics aren't as good as your X-Box or computer at home, but big deal, it gets the point across.
In my opinion, Xbox's are among the first things that should never enter unit lines for the sole welfare of the troops. Guys play enough of that at home (I too am guilty), we dont need to do it at work too.
As for the Xbox's being brought into the unit: they were paid for out of our canteen fund to be used as a training aid of some sort. But like I said, I don't believe they're much of one. Just my 2 cents though.