(Almost) One image per second
Last night, Thilo sent back pictures of Discovery's launch that he took himself, including some taken with a remote camera. The latter were taken with the help of a sound sensor that triggered the camera, located directly at the launch pad.
Both image sets feature one image per second taken between launch +1 second and launch +4 (from the press site) or +5 seconds (with the remote camera). (Thilo just mailed me stating "one image per second" is not correct - hence this update at 17:55).
For optimal viewing use the full-screen mode. When in this mode select 'Show Info' to display the image captions. If you don't have Flash, click here or here.