selectspec writes: "Old pnuematic tubes used for delivering mail in 19th century cities like New York possibly could be used as piping to hold new fiber lines. Accoding to this nytimes article the tubes were used to deliver mail through New York City via pressurized air in 1897. Now, an entrepreneur wants to use the tubes instead of laying new pipes which would cost upwards of 100 million dollars a mile in New York City." Pneumatic tubes
have been ahead of their time for over a century, so it's cool to see some of their inherent latency problems can be overcome by creative re-use.