Just noticed this under one of the Build failure notification e-mails received from the TFS daemon:

 

- You are receiving this notification because of a subscription created by xxxx\Hadi Hariri Provided by Microsoft Visual Studio® Team System 2008 <http://msdn.microsoft.com/vstudio/teamsystem/>

Notice there's no "If you do not wish to receive future notifications please....."

Nope, you're screwed. Your best bet is to not break the build...or break me!