Last night I upgraded the service running at status.severedelays.org (html, xml, json) to include current status for the London Overground and Docklands Light Rail (DLR). This rounds out the service nicely for London.
The last couple of weeks have also included a lot of behind-the-scenes work to make the service scale. I'm pretty happy about where it's at, and am now ready to include new transit networks and new developers.
If you would like to work on a current status API for your local transit network, get in touch with me. Severedelays.org would like to host your data. It's trivially easy to add new transit networks to the service. For example, take a look at the work required to add the London Overground.
This process makes it easy to add new lines, stations, or anything else with data available on the web. My next task for the service is automated service aggregation. I'll be providing aggregates of service levels for each line in the system. So you'll know how often it runs without disruption, and what the likelihood is of it running without disruption tomorrow.
There are hundreds of great applications to be written with this data. Drop me a line if you are interested.