In a scene during the original radio version of The Hitchhikers Guide to the Galaxy, Marvin hums 'Shine On You Crazy Diamond' by Pink Floyd.

Douglas Adam's autobiography is called 'Wish You Were Here'.

He also played a couple of songs live with Floyd at a live concert.

I dunno if that's music facts or trivia or anything, but he's my favourite author and they're my favourite band, so I thought it was pretty cool.