It's really hard to find anyone dying from nicotine poisoning.
Not really very hard to find people dying of water poisoning though...
Woman in water-drinking contest dies - US news - Life | NBC News
I think the key here is it's virtually impossible to get poisoned from nicotine by accident, as it's pure form in lethal dosages doesn't exist in nature, you have to purposely go out of your way to get enough of it to try and kill yourself (or even be exposed to it) - it's not surprising the only examples are suicide attempts.
Just like that poor lady, she had to go to extreme lengths to die from water intoxication - that would be very hard to do by accident, as in any other circumstance, you'd pee it out - they were deliberately not doing that.