This article gives a few more details about the self-tuning piano:

  A Piano That Runs Hot and Cold to Keep Itself in Tune
  January 2, 2003
  By IAN AUSTEN

  Don A. Gilmore is developing a prototype of the self-tuning
  piano, an instrument that will need to warm up before it
  can be played.

Sorry about the long URL.  The New York Times might require you to
register with them to read this article.  Dunno for sure.  This is an
interesting article, however.

http://www.nytimes.com/2003/01/02/technology/circuits/02next.html?ex=1042560012&ei=1&en=9650026169577437

Mark Kinsler
Lancaster, Ohio USA
http://www.frognet.net/~kinsler