Imho it produces cool results with large dot size and relatively small number of sheets, with some space between sheets. Here's one example: http://img60.imageshack.us/img60/1267/rasterbationdt5.png

And if you do this, use some sturdy material to print on. Standard copier paper as it just looks crappy.

edit: Thinking of it, maybe canvas prints would be cool. 10in square prints, maybe 1in apart...