Never underestimate the throughput of a pigeon.
While in New Zealand, we went on a caving trip that included a 100 meter abseil (rappel) into a cave and then climbed back out. One of the tour guides had a digital camera in a waterproof housing anchored to his harness. He took some pictures of us on the way down and when we got to the bottom.
The tour operator (Waitomo Adventures) wanted pictures from the adventrue to be ready by the time that we returned so that we could buy them. To do this they took the sony memory stick out of the camera and put in in to a little backpack on a carrier pigeon. They then let the pigeon go and yelled instructions to it on how to get back to the tour office. I think that the pigeon already knew the way, though.
When we got back (a 20-25 minute trip in a van) the pigeon had arrived and the staff back at the office were busy printing out our pictures.
We bought the pictures on CD also, but I don't have those with me right now. I'll post those soon so you can see the fruit of the little pigeon's labor.