Beside the war in Iraq and the scrap over the President's Supreme Court nominee, last month's announcement of the Rocket Racing League--the what?--came off as comic relief. What's this, a new Jetsons movie? Or could George Plimpton be risen from the dead and writing spoofs? The Rocket Racing League, though, is no put-on. It's real, the brainchild of Dr. Peter H. Diamandis, M.D., the private-space-travel entrepreneur, and Granger B. Whitelaw, entrepreneur, venture capitalist and two-time Indy 500 team winner. Diamandis was the force behind last year's Ansari X Prize, won by Burt Rutan's SpaceShipOne for kissing the boundary of space...