Following is a video of what is called "Evacuated Tube Transport." It would consist of different sized capsules that can carry cargo and people using maglev (magnetic levitation) tracks. They would travel at speeds of 350mph to 4000mph. In the video it says that you would be able to travel from New York to LA in 45 minutes and from New York to China in 2 hours. Sounds so crazy to me but I'm sure that it will happen one day. I know the same was said about flying or space travel.
Visit the website here to read more about this travel system.