People, Let us be objective here. Kerala 'has' 4 airports (including the forthcoming Kannur). Is developing two world class sea ports (Vallarpadam and Vizhniham). Is developing the waterways to western standards. Is planning a 6 lane expressway as a backbone from north to south.
If TATA is making Nano anywhere in Kerala it can be transported to anywhere in the world with least investment. No other place can compete or offer any better logistics!!
So, the best place for NANO is Kerala (preferably, North Malabar)