As for the story of Noah I recently watched a docmentary on Noahs ark. As far as I can tell the documentary debunked the biblical story of Noah pretty well if everything in the bible is to be takin literally (And i dont mean that in a bad way. In my opinion all of the stories have very important symbols and themes that should be understood and undertaken. e.g. Noahs Ark: man should not be over confident or it will leed to there distruction. That is a very important lesson which I am sorry to say we are not heeding in the world today. I compare the stories in the bible to thought experiments that scientists use to explain things), it however takes hints that may have been exaggerated in the bible and cross references them to the stories that are told by other cultures in the area, babilonia(sp) and so on. It conclusively proves that there could have been a guy that survived a flood in that area. But it explains how a global flood is physically impossible because there is not enough water in the air and on the earth to completely flood the world to the top of Everest. they also explained that for Noah to build an ark of the size that was specified by god 1. could not be done in a week given modern technology let alone the technology of the time. and 2. that a structure as large as the ark could not be build from wood because it would not be stable, the wood would warp and bend and the ship would sink.
Personally, the counter story that they put fourth while making sence just doesnt seem right. and as for the biblical story of Noah, I just dont know so I can't comment for or against it.