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. <nudge nudge wink wink>