A sleek commercial rocket plane that represents the ultimate thrill ride for well-heeled space tourists and amateur astronauts. Seating six passengers and two pilots, Virgin Space Ship Enterprise--also known as SpaceShipTwo--will begin test flights next year with commercial launchings carrying paying customers starting after government regulatory requirements are met. More than 300 people have already put down deposits or paid the full $200,000 cost of a ticket for future sub-orbital up-and-down flights aboard the new spacecraft. Most of those ticket holders, along with California Gov. Arnold Schwarzenegger and New Mexico Gov. Bill Richardson, were on hand for the SpaceShipTwo unveiling Monday at Mojave airport, braving rain, high winds and frigid temperatures to witness the long-awaited roll-out. The first Space ship "Space Ship One" was a rocket-powered aircraft that completed the first privately funded human spaceflight on June 21, 2004. SpaceShipTwo will be released at an...