Influences of Lang's "Metropolis"

I work in the Resource Library in the Traina Center, and part of my job is working with our database that lists the names of all the films in the library. I was checking out Metropolis one day, and I noticed that we had multiple entries for the film. After doing a little research, I found quite a few different things that were influenced by Metropolis (ending with a producer buying the rights in 2007 for a possible adaptation!).
According to Wikipedia, Since 1927, two musical theater adaptations of the film have been performed. The first was at the Piccadilly Theater in London in 1989. The most prominent change to the story was anglicizing the German names of the characters: for example, Joh Fredersen became John Freeman, etc. The score was updated and change, and then performed again in 2000 at the Pentacle Theater in Salem, Oregon.
In 2002, Osamu Tezuka's 1949 manga was converted to a feature length anime film, Metropolis. This manga (and film) were said to have been influenced by Fritz Lang's film, but follow a slightly different plot line.

In 2007, producer Thomas Schühly bought the rights to remake the film (no word on where this has gone quite yet).
In addition, a few musicians have pulled inspiration from this film. Madonna's music video for "Express Yourself" pulls influence from the film, as well as Queen's "Radio Ga Ga," which features scenes from the movie in the video.

Link to the Madonna video: http://www.youtube.com/watch?v=GsVcUzP_O_8&ob=av2e
Link to the Queen video: http://www.youtube.com/watch?v=t63_HRwdAgk