Made from black and white plastic rubbish bags cut to (roughly) confetti size and glued onto a 14"x16" board.

Full view is 1000px but here's a ridiculously large version if you're interested which gives more detail.

Individual faces are here:

Paul
John
George
Ringo

And you can find the reference image here

Several fancy-schmancy magazines gave their lives for this! Good luck all! :)

I chose Photoshop for my collage.
Swans are from morguefile, some other images from www.damnedinblack.net, and the sky background is mine.