[jalsing]

Exposing Cards- A player who exposes his cards with action pending may incur a penalty, but will not have a dead hand. The penalty will begin at the end of the hand.

Finally this is cleared up, at least it was vague previously (in RR anyways). I've had cases where I've let the hand play when someone accidentaly exposes cards prematurely, and each time there's a player or players who say 'oooh his hand is dead' when really it's not..