Few modern works feature deities suspended by wires from the ceiling, but the term deus ex machina is still used for cases where an author uses some improbable (and often clumsy) plot device to work his or her way out of a difficult situation. When the cavalry comes charging over the hill or when the impoverished hero is relieved by an unexpected inheritance, it's often called a deus ex machina.
Note: This guide is still in the early stages of development.
Three question marks mean I have to write more on the subject. Bear with me.