Actually, Walt was special before coming to the island and I am guessing that the island enhanced his specialness. We also knew that Aaron was special as well - as told to us by the 'fake' psychic in Australia that sets Claire up to get on Oceanic in the first place.

Some bad stuff goes down if Claire doesn't raise this baby and I'm guessing it's because of his 'specialness' aka 'superpowers.' These superpowers need a positive influence on his life or he'll turn to a life of crime.

I kinda forgot about that stuff until you pointed out Aaron's crying at all the right times though. I wonder where they were going (or will go) with that storyline. Do you think they even remember that they brought it up? I hope so.

__________________
...embrace the senile genius...
watch him reinvent the wheel...