Useless Machine Kits are now available Answered
Solarbotics.com has just come out with a complete parts kit for the Useless Machine:
It's only $25 and includes a very cool acrylic case as seen in the photos. Dave Hrynkiw at solarbotics really did a fantastic job with the design.
Keep in mind this is an even lower price than if you bought just the electronics parts at digikey!!!