Pyro, can you ask Jim if he's willing to release his 20,000 Leagues demo, if not in ADF form, how about as an AVI or MPEG? That was truly the most exciting thing I saw on Amiga back in those days and I'm sure everyone here would enjoy it. How sad Disney never went for it!
I recall he showed it at a graphics training seminar he gave and then someone stole the disks overnight. He also had a lot of trouble with the SCA virus deleting some custom boot block loader he wrote for it, if I remember correctly.
This reminds me: a couple of years ago I discovered a new, shrink-wrapped copy of "Saucer Attack!" for the C64 at a surplus software store. In a magazine interview, Jim described it as the game that every kid has, but nobody bought.