(Almost) One image per second
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.