Media outlets site goes down a little before noon ET
Business travelers may welcome high-speed, city-to-city transport
Acquiring Mobile Technologies could give Facebook another mobile boost
Spacecraft may confirm scientists' ideas about how the solar system formed
Monthly software update also adds voice commands and movie info
Challenge focuses on building robot that can find and collect samples on Mars, asteroids
Facebook wants a bite of Twitter's success with real-time events
MixBit launched for creating, editing and mixing videos
Space agency calls for alternative projects if space telescope can no longer hunt for Earth-like planets
Company will show off a new logo each day until the official reveal on Sept. 5
