TeamCity provides several ways of getting notified about your builds’ status, like e-mail notifications, Jabber/XMPP instant messages and more. All the notifiers allow flexible customization to fit your needs.
However, there are other ways to keep track of your projects. For example, Scott Cowan has created TeamCity Twitter Notifier plugin. The installation is easy, and providing that Twitter allows to create private accounts, you can keep project notifications both restrictive and accessible. So if you like to twit, give it a try!
The JetBrains TeamCity Team