We've just been hepped to a video by someone named Phreakmonkey, wherein he gets his hands on a Model A Acoustic Coupler Modem and puts it through its ever lovin' paces.
http://www.engadget.com/2009/05/28/video-45-year-old-modem-used-to-dial-into-web-view-wikipedia/
Reminds me of the original War Games with Ally Sheedy i think. This thing is much older tho.