On a technical note, there's a lot more than 168 pictures there, so they must have repeated them.
Also, it looks like they majorly tweaked the color values for the mosaic, which misses the whole point of this method.
In fact it's almost like they just threw an opaque layer down over the background. I dare say that's a completely fake way to reproduce the technique... Perhaps "the real way" is proprietary.
Yes, my quick count says there are 672 faces (28 x 24) so they must be repeating them.....
Fair point. I have to hand it to the Sun though - this picture is a lot "spiritually" better than that disgusting montage of President Bush made out of porn pictures that some loser artist came out with last week.