To use notifications you need to implement a Notificator interface (http://javadoc.jetbrains.net/teamcity/openapi/current/jetbrains/buildServer/notification/Notificator.html) and register it in TeamCity.

The methods of a Notificator are called when certain events in system occur; you can send a HTTP request, or any other remote call in them.

Here are several links to third-party notifiers, could serve you as an example: http://confluence.jetbrains.net/display/TW/TeamCity+Plugins

As to our "lamps", we use traffic light =).

Here's a short video about how we tested it: http://www.youtube.com/watch?v=Y4SNj5ngXXE

The final configuration is a bit different. There is a simple web-server that can turn on any light, and main the notificator sends HTTP requests to it.

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Maxim

i needed the same responsible info for the rss feed

i created a new request, since i did not find it one:

http://youtrack.jetbrains.net/issue/TW-11814?projectKey=TW&query=rss+Responsibility