Yup, its a sad story, but every LL'er is told that ingesting large quantities of H20 over a short period can be very lethal.
A while back there was a story in the papers about a company who did a "Hold you Wee for a Wii", where contestants had to drink loads of water and whoever could not have to pee the longest won.
The "winner" drank something stupid like 10litres of water in 3 or 4 hours, and basically drowned herself from the inside.
We all know the dangers, but I understand why you'd want to post it again. As BL said on the other thread, everything in moderation - overdoing ANYTHING is bad for you.