"This map shows all trains on the London Underground network ... The trains move in approximately real time. ... Live departure data is fetched from the TfL API, and then it does a bit of maths and magic. It’s surprisingly okay given this was done in only a few hours at Science Hackday...[by Matthew Somerville et al]"
Beijing to Hamburg in 15 days by rail. Biggest snag: the switch between standard-gauge to Russian-gauge at the Chinese-Mongolian and Belarusia-Polish borders.
Google is adding a system to allow public transport authorities to add information about buses and underground lines and their scheduling information to Google Maps.