For those who consider 'mere' steam calliopes as instruments for
dilettantes and wimps, there is a European installation called the
'Large Hot Pipe Organ'.  I quote from their web site at
http://www.lhpo.org/ :

  "The Large Hot Pipe Organ is the world's only MIDI controlled,
  propane powered explosion organ. The LHPO's pyro-acoustic
  explodo-rhythmations will throbbatize your earholes and dance-ify
  your booty and make you realize what "Industrial Music" _really_
  means!"

The photos are spectacular!  There are a couple of MPEG sound clips,
but I haven't listened to them yet (no sound in this computer).

Oh, and it appears from the Production Requirements document that
"home base" for the organ is Berlin.  Just when you thought that
Einstuerzende Neubauten was becoming too mellow to bother with...

Blast on!

Colin Hinz
Toronto, Canada