Safety, Astronauts, and "Paper Rockets"

Interesting war of words between NASA's safety advisory panel, which thinks private spaceflight contenders (like SpaceX with its Dragon capsule and Falcon 9 booster) are not safe enough for astronauts, and SpaceX's Elon Musk, who points out quite emphatically that the panel's preferred alternative, Ares I, has yet to prove its own safety - even after NASA revised the "man-rating" regulation to make sure the in-house rocket could meet the specs.