Well, I actually tried that once when I thought keeping my business PC busy on weekends might be a good idea - but the frustrating point was, that my home farm (3 PCs - not the fastest whatsoever) would have rendered the image twice or 3 times while the scene and all the textures were still uploading over the internet.

ADSL - speedy down, lame up.  Duh.

And having that in both directions - upload (scene) to the cow - upload (image) from the cow -  doesn't make things any better.

Think, it's a nice community-ish idea, but maybe some years too early....