In Husdon/Jenkins, I can setup notifications when the build is broken to email the user(s) that made the checkins that broke the build. How do I do this in Teamcity?
At least with Teamcity 6.5 you have roles and groups, and you can set notifications settings based on them.
To achieve what you want, just take a look at the notification for group ALL (everybody) that is configured by default and you can't delete it.
http://yourteamcityinstall/admin/editGroup.html?groupCode=ALL_USERS_GROUP&tab=groupNotifications