From what I've heard of his (and that's not much), I think he's amazing-and I agree with you about the Campanella! Btw, I printed out the score to that one, but I'd like to know where you got a hold of his other stuff. I'd be really interested in that...
Also, what do you think of his "version" of the Hungarian Rhapsody (I have an MP3 btw if anyone wants it)? I personally think it's better even than Horowitz's, which I suppose comes in at a close second.
I'd be really anxious to hear his Bumblebee, though. Any chance of an MP3?