A real time HD view of the earth from video cameras attached to the space station:
http://eol.jsc.nasa.gov/HDEV/
If the screen is black the camera is currently on the dark side of the earth. If it is grey, the cameras are changing (several HD cameras are being evaluated and they switch) or the space station is in a downlink dead spot. For best results switch the video feed to HD and expand it to full screen.
One camera operates at a time and they are pointed in different directions. The station moves along at a good clip and the motion is obvious -- you see the earth as you might looking out a window on the space station in real time. Here's a still from one of the cameras: