Can the LCD of the *istD be used as a viewfinder

[R�diger Neumann]

>From CNET.com:
"Unlike competitors, however, this camera has a 1.8-inch LCD that can be
used as a viewfinder instead of just for playback and menus. "


How can that be. How can you see the picture on the LCD screen when the
mirror is down. Has the *istD an additional CCD in the optical viewfinder
path ?

If yes, that would be a real novum.

regards
R�diger