I have a facility which uses css and ajax to perform live plotting of
routes between two London underground stations. The css plots are
overlayed over a London Underground map, with each station as a hotspot.
The underlying platform is Ruby on Rails.
I have incorporated certain Web 2.0 features like votes for the best
routes, station name autocomplete, context sensitive points of interest
along the selected routes etc.
The URL is http://public.ok2life.com/tube/routes. As usual, let me know
if you have any feedback by either using the provided MessageBoard, or
send me an email.