Passport Law "What affect will it really have"

As I am sure everyone has allready heard or read about the new Homeland Security law which will come into affect on December 31st 2007, making it mandatory for everyone to carry a passport, or a special pass card when travelling from Canada to the US. I would love to Know more about or discuss this matter especially concerning tourist regions like Niagara Falls, Toronto, Banff, Montreal, etc.. and how will it affect Canadians travelling over to the USA. Is this law really going to withstand, or will this fall by the wayside, considering what impact it could hold for alot of businesses, even industries on both sides of the border. How will it affect the Trucking industry, I am both concerned and very interested. :bash: