ping
http://www.amazon.com/exec/obidos/ASIN/0028643968/blackcatsyste-20
http://www.npr.org/programs/lnfsound/stories/000526.stories.html
http://www.spynumbers.com/books.html
If it is on the npr website, it must be (take your pick) true / vile and occultic!
Cal, I had found a bunch of sites that had the number code as a newsletter, but Struwwelpeter, had a good site and I can't find it.
There are sites that say you can listen on line, but with dial up internet, I get into broken sounds and videos.