none said:

Here's an idea for a future letter.

http://www.nytimes.com/2010/05/05/movies/05metropolis.html?ref=movies

It seems that Metropolis is going to be getting the full archival preservation treatment. The film which was the inspiration for 3po, which got a colorized special edition in the 80s (something Lucas despized [colorization] at the time yet 10 years later mimiced [special edition]), well they've found a 'missing' half hour of the movie and it will be included in future released versions.

Metropolis colorized? This is news to me. Are you sure you don't mean the color tints Giorgio Moroder used for his 1984 restoration? Tinting is a technique that's been around since movies were invented.