The Commonwealth Scientific and Industrial Research Organization has created, Airhockey Over a Distance. This prototype of "computer-mediated human-to-human interaction" allows you to play an actual game of airhockey with a physical puck (well two of them) over the network. A player with one half of the table sends his puck across the rink. When it reaches the "center," the system catches the puck and records the location, angle and velocity of the puck. Then, it transmits this data to the other table. On the other end, the table ejects its own puck to the opponent and play continues.

Via Engadget