This isn't a brand new feature, but one might not yet know that besides email, Jabber, rss, IDE and Windows tray notifications, you can configure TeamCity to sent notifications about builds status via Google Talk instead of Jabber.
The only thing you need to do is to set the following options on the Administration | Server Configuration | Jabber Notifier tab:
Server: talk.google.com
Port: 5222
Server user/password to send notifications from.
Note, that if you use Google Apps for domain, you should specify full username with domain part in the Server user field. Naturally, these settings
Get Notified about Builds Status in Google Talk
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