I've just posted the first part of a Dragonlance/Nehwon crossover fan fiction story I wrote almost 16 years ago. Do take a look.
The rejection letter for this story, which I still have, is dated February 28, 1994. Why do I still have it? Because it was the first rejection letter I ever received in which I got a hint that a story of mine, under different circumstances, might have been published. It reads, "TSR doesn't own the rights to Fritz Leiber's characters for new fiction, only for games. The resulting legal hassle (sadly) makes the story unpublishable."
Sadly, it says. Isn't it amazing how one kind word can inspire a frustrated author to keep trying? Later that year, the same editor bought an adventure of mine for publication in Dungeon magazine, and thus my writing career heaved itself up from the unappreciated muck and shouted to the impersonal heavens, You like me! You really do like me!