Sometimes the headlines write themselves.
A California woman died of water intoxication after taking part in a radio station's water-drinking contest to win a Nintendo Wii video game system. Participants competed to see how much water they could drink without going to the bathroom.
The contest was called "Hold Your Wee for a Wii", thus providing the greatest ready-made headline ever. All Google News listings here.
And yes, you can die from drinking too much water. The folks at Wikipedia have an up-to-date entry on water intoxication.