The finished image is, of course, from one of the most famous fractals, the Mandelbrot set.
Warning: This is addicting! To quote the author: “There are a lot of pieces in this puzzle. I don’t expect anyone to finish it.” You might just find yourself trying to prove him wrong.
In about half an hour last night, I finished 11 of the 29 puzzle pieces that make up the whole image – or is it just one piece of the next level?!
Update: Here’s the MetaFilter thread: “There are a lot of pieces in this puzzle.”.