Where does the quote 'Don't quote the raven' come from?

I know of the poem "The Raven" by Edgar Allan Poe. I did a little searching because I didn't recognize the quote "Don't quote 'The Raven.' " Although many people have used that phrase online, it appears that the phrase (possibly originally) comes from a poem that was posted in response to another question here on Answers.com.

It was part of a poem written in answer to the question "Do we have any good poem, song, or story writers out there?"