I wanted a nice easy way to tell if there's a broken build and didn't find any of the build monitor tools available obvious enough while still being unobtrusive. So I wrote a little console app that changes the wallpaper colour which shows through the taskbar. I then scheduled the application to execute every 15 minutes. It's not at a level that I could roll out to the entire company (changing wallpaper is a tad mean) but it's a good proof of concept