Sorry, I know the last question was unrealated to the fuel warning lights, but wanted to get back to that subject, because that is why I am on this post.
That thing is driving me crazy too. I am glad to see that people have risked going past the 0 miles left and still have not run out of gas. I have an 09 and really like the car. I generally get 32 - 34 mpg, and no amount of hypermilling every seems to get me past 35 mpg. I know I could have gotten 50+ mpg with a Prius or Insight, but personally the less mpg is worth it for the style, speed and size of the NAH.
My warning light is on now, saying I have 19 miles left but I only have 523 miles on the trip. In the past, I have filled up when the light came on, but now, with everyones input, I am going to risk getting below 0 and see what happens! Those scary warning lights flashing in my face I can now ignore, which is darn near impossible, because know matter how many times you turn it off, it comes right back on after 1-2 miles.