There's also the nostalgia element for Douglas Adams fans. Facebook naming its assistant after Marvin, the paranoid android with a brain as big as a planet from Hitchhiker's Guide to the Galaxy ...

In which a spaceship lands in Knightsbridge, Arthur Dent and Fenchurch discover God's Last Message to his Creation, and Marvin the Paranoid Android makes his farewell appearance. Arthur and Fenchurch ...