In addition to being used in anime and japanese video games a lot, an other interesting thing to note about this "..." is that a lot of TTS programs I've enountered pronounce this as "and so on".

You just gotta fire up the Amiga from time to time, and type in:
"................................................................................................................" just to hear it say "and so on and so on and so on and so on and so on and so on and so on and so on and so on and so on and so on and so on and so on and so on"

actually, if you do this with any text, in a text-to-speech program, you'll be reminded that it sounds nothing like a human voice at all.