A reader of this blog pointed me to this interesting project Matthew Somerville which displays the live position of trains on the London underground railway system. It is a fun visualization, and a great example of free data and dev ecosystems coming together. I wonder where this could go product-wise? Analytics for train problems? delays? Many of the tube lines have trains running at a frequency such that one just hops on the next one that arrives. I'm guessing that it might be useful in a late night, mobile scenario where optimizing dynamically over connections could make a big difference to getting around.