Original posting below Chris...there's another link on the page too.
http://www.hfunderground.com/board/index.php/topic,14944.0.html
I have not been able to get any information out of them other than this email back in March or April! (Copy and Pasted below)
Thanks for contacting us!
I'm cc'ing Richard Colton, who headed up the TIS project. He can tell you more about it.
We've been getting quite a few radio enthusiasts who have caught the signal - even one in Sweden!
Thanks again, and come visit us any time!
Alex MacKenzie
Curator
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Springfield Armory National Historic Site
One Armory Square, Suite 2
Springfield, MA 01105-1299
Ph: (413) 271-3971
Fax: (413) 747-8062
Alex_MacKenzie@nps.gov