Electric Car Chargers

Hawaii Endorses Plan for Electric Cars from the NY Times, basically the state working with a private company wants to set up recharger stations.

Questions that have not been asked:

1. How long does it take to charge a car?
2. Would most cars be charged a meaningful amount to justify the cost of the charging station?
3. Why not just charge them at home?
4. What is the estimated amount of Electric Cars per year (everyone is doing hybrids currently, plug ins are someday).
5. What is the estimated cost of an electric or plug in car by year?

My 2 cents, if cars are charged at home and they take a while to charge (battery technology unfortunately has not improved that much), what good does a charging station do? Is this the best use of money? Perhaps subsidies for electric cars that can be recharged at home first? Or set up a fleet of rental vehicles that people can use that are electric till the cost decreases?