I have been wanting one of these since I first learned about them. It is a 4-letter-word device, like the Super Electrofluorescent Profanity Machine except that this one uses Panaplex style ZM1350 neon displays. Essentially, they are flat versions of the B971 and can be used as a replacement with no electrical changes needed.
Basically, the device displays random words that are four letters long. The video gives you the basic idea of how this works:
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This device was built by Mike Bowers but was designed by Peter Hand. It appears to be based off the original Raymond Weisling design. (Warning, a few people have had bad experiencing ordering from Zetalink. I trust Jeff's reviews so I would personally avoid this site as well....)
http://www.mbowyer.net/Mikes_Corner/Projects/Entries/2008/4/22_ZM1350_Four-Letter-Word.html
