To my knowledge, you cannot legally carry a sword anywhere in America without a specific reason (competition, Ren-Fest, etc) off your own property. Concealed weapon licenses only apply to guns and, generally, only if they are concealed., which is impossible with most swords.
At least in Texas (I'm not sure about Everywhere else
), a magnum revolver is considered less dangerous than a bowie knife in the hands of qualified people. I hate politics.
Besides, do you really want to carry a sharpened blade around everywhere? It would almost instantly heighten the tension in any situation. True, you might never draw it, but slinging a sword around would be percieved as an unspoken threat by some people (I know the waiter wouldn't spit in your food). I would be content merely with a knife large enough to do something with.