When I visited the Unix room at Bell Labs in 1993, there was a picture of Dan Quayle before a blackboard with the famous misspelling. Below the the picture was the text "My heroe -- Ken Thompson".
I got the reference, I just don't find 'references' funny. I don't see it's a joke (or otherwise interesting) for a commenter to remind us, that like the parent commenter, former Vice President Dan Quayle also mispelled "potato" in 1992.