Storyboards
See Sheila Sofian's storyboard notes, Chair USC Animation.
Animatics
In Flash storyboards are scanned in and used to create an animatic which is synched to audio to give the client and artists some indication of how the work will look when produced. Audio (streaming) is put down first and the boards, which are scanned in, are put down to the audio.
Invisible buttons are often put in the corners to quickly skip through sections for the user to review.