I really think that its cool who easy it is to create your own FUSE filesystem for whatever wacky way you want to expose your code through files. One of my recent ideas (haven't yet had a chance to implement it), was to create a FUSE filesystem where you would mount a video file, and would have access to each frame as a file. Then you could do standard image editing stuff with whatever software you wanted *on each frame*. Didn't work out quite how everything would work, but I thought it was a cool idea.