"The Space Shuttle Endeavour has taken off and is in space, traveling to the International Space Station where it will be delivering parts including the third connecting module known as 'the Tranquility node' to the station. It's also bringing up a seven-windowed cupola to be used as a control room for robotics. The mission will feature three spacewalks."
"The best time to tune in is around 2pm pacific time (06:00 GMT), when the astronauts are just getting up and starting their checklists for the day. Astronaut sleep periods are approximately from 6am pacific to 2pm pacific. There will be minimal mission audio at that time, but the rest of the time all sorts of stuff is going on."