I was shocked to find out about it too. The whole information superhighway thing is amazing, but just having GameFAQs to search through all the possible different versions helped me locate one that was actually different.
Forget who told me, or if I read it on wikipedia(might've been the topic creator of this thread) but Doug Smith contracted for 150 levels in Lode Runner and he let random people from the neighborhood try and create levels. I have to say, it showed a bit in some of the levels as they are not terribly sophisticated.
But perhaps my fondest memory is of a few levels that actually had you entrapped to start. I think it was part of the copy protection, that somehow you got flipped to a "bad" level. The disk I had was bootable and had the commands for the game if you typed catalog. I think you could run the ^ program(file lister for the Apple) too.
My principal said, 'Emo, Emo, Emo.'
I said 'I'm the one in the middle, you lousy drunk!'
-- Emo Phillips