I saw this article in popular science's 'HOW2.0' and just thought it was so cool; I couldn't resist. I did not create the code or design. Credit to this project goes to the code authors listed in the Arduino sketch, and the authors/creator(s) listed on the PopSci page. Info on this project here: http://www.popsci.com/diy/article/2008-06/ga-g-uzzler-meter. Pictures of the finished/semi-finished product I made are below.

All of it in the case:
http://www.flickr.com/photos/7507189@N04/2932069229/

The exterior:
http://www.flickr.com/photos/7507189@N04/2932936508/

Innards:
http://www.flickr.com/photos/7507189@N04/2932936508/

PCB traces:
http://www.flickr.com/photos/7507189@N04/2932071767/