If the threes turn out to be relevant, I hope they call the game the "Trinity Thriller." Just throwing that out there.
Also, my biggest issue with the carpet pucks people have been posting is that they would wear over time if they're to be handled a lot, just look at the edges of Frisbees from last year. If we do see something like carpet hockey, I would expect game pieces like this, a toy I found in my house the other day. The ball bearing (could be any type of weighted ball) is nestled in a disc that moves across the ground as the ball rolls freely inside it.
http://imgur.com/oyUPkGJ
Additionally, not much mention has been made of the possibility for multiple game piece sizes in the same game, which would incorporate the sorting that was so widely discussed in the other thread as well as the hockey and cooperation discussed in this one. Just a thought.