I used a decompiler to root around in the swf just recently, and streaming graphics is just used in place of the same old \"Loading...\"
The script loops through the same 6 frames, checking each time whether the last frame is loaded, and when it is it starts playing.
Any regular flash file that you open streams as it plays, that\'s the reason some animations look choppy, but many things, like this intro, pre-load the graphics to make it smoother.
josePhoenix