Just an update.
I contacted Jack Daniels about three weeks ago via email with no response. Today I called and spoke with Randall Fanning, the senior marketing services coordinator. He gave me a little background on when Jack Daniels was making beer. Apparently it didn't go over too well and they only operated for a couple of years in the 90's.
He was sort of vague on if this thing had any actual market value but he did say that they are extremely rare, and that the distillery has held onto four of them. I tried to get a solid answer out of the dude and all I got was pretty much "Just throw it on ebay and see what it does." He was pretty shifty, so I decided get a second opinion.
When I got home from work I contacted an appraisal company for some more information. Here's part of the email I received in about an hour of sending them a description and a picture of the keg:
"To my understanding, the Jack Daniels kegs were part of a program to test something regarding cold storage transport, but I could not find any for sale. I checked with two Jack Daniels collectors, one a former executive, who said they had about 500 made for a lot test and that they were sold for scrap over two decades ago..."
Thanks for the advice on holding onto it, I'm glad I didn't cut this thing up. I am not a collector and apparently there's some crazy Jack Daniels guy out there that can give this thing a better home than I can. I'm going to get a second appraisal and probably take the dudes advice and just "throw" it on ebay now that I have some background information.
For those that PM'ed me, I will post the link to the auction in the appropriate section of the forum when I get everything together.
Again, thanks for the heads up.