How about a Gil Evans chart and a little Hendrix Voodoo Chile in your diet...

http://www.youtube.com/watch?v=V2O9Y_91DEs&feature=related

And, while we're on the subject of unusual instruments in jazz, and even though this is not a tuba feature, I am oddly compelled to post this:

http://www.youtube.com/watch?v=wAFzzhbaKsU&feature=related