I voted Vitality Sensor, not entirely on it's own merits though. Without the right software, I don't see any of them going anywhere (3D especially), I'm only voting for the VS on the principle that the player-state may be more integral to games in the future, it's the only one that I think could be a major step in gaming.
A game I'm developing with some friends:
www.xnagg.com/zombieasteroids/publish.htm
It is largely a technical exercise but feedback is appreciated.