A few days ago Felix Baumgartner jumped from 71,581 ft. That's 13.6 MILES up! Only a handful of people have every jumped from that altitude where you can start to see the curvature of the earth. At that altitude you HAVE to have a pressure suit on (unless of course you feel like having your blood boil and all that of that happy stuff).
My favorite statistic from this jump: His freefall speed was estimated at 364 mph(!!!)
New York Times articles HERE
Red Bull Stratos article HERE and a tour of mission control HERE
And, again, the main site HERE