Live from lanch pad 39A
From the Reuters photographers blog on the right side bar here I picked up that they had an article about their coverage of the space shuttle launch. Watch the video to see how Scott Audette from Reuters uses the EOS 40D and EOS 30D with wireless transmitters and a custom transmission system to shoot images of the launch using cameras set out in the field hours before launch.
For Reuters the important thing is that they get the pictures from the cameras and on the Reuters wire service in about 4 minutes. This is a real edge since they can't get back to the cameras for at least two and a half hours after the launch.
Note also that Scott mentions that he's using a custom remote for sound based triggering of the camera that's built by one of Canon USA's pro reps. A guy who used to work for Nikon but joined Canon earlier this year.