At nsquared we (not surprisingly) aim to build zero defect software. We have used cctray for a while, now we have set up Big Visible Cruise. It rocks!
Now we can be visibly green, or as DJ Ruby Rhod would say 'Super Green!'
The green boxes each represent a current project and its status. If a build fails, or tests fail for one of the projects, then the box representing that project will turn red. This provides a very visible way in our technology studio to see that things are going great.