London Tube Strike Map
Workers on the London Underground system are currently on a 24 hour strike, causing disruption to the journeys of London's commuters. The BBC are using the Ushahidi incident reporting system to provide a Google Map of the disruption caused by the strike.
Londoners can use the map to report which stations and tube lines are currently experiencing delays. It is possible to report a disruption by sending an email to firstname.lastname@example.org, by sending a tweet with the hashtag '#TubeStrike' or by completing a short form.
As with all crowd-sourced systems this map is reliant on user input and, to be honest, at the moment the map looks a little empty. It probably isn't the best source to find out if your journey is likely to be disrupted by the strike. It is nice however to see Ushahidi being used by the BBC.