Felix Baumgartner is up in the air, and if all goes well he will be the first man go to supersonic without the use of a propulsion device: Just him and his space suit. The first launch was aborted due to high winds, but this one seems to be going smoothly. You can get more information outside of the video here at Red Bull Stratos.
Outside of any unforeseen problems, Felix will break four records today: highest altitude reached by a man on balloon, highest jump (at least 120,000 feet, 23 miles), longest free fall ever and first man to go faster than the speed of sound without any propulsion device. To do so, he will ride the biggest balloon to ever carry a human being. That's a lot of "ever" and "highest" in there. Good luck Felix!