We have a continuous build environment set up in our which plays a sound on success ("woohoo!") or failure ("doh!"). The audible feedback on the build success is a great way to motivate the team to keep the code working.

I managed to set this up in Quickbuild by using a command builder that executes a script (batch file) that plays a wav file. Works fine, but it would be nice if Quickbuild supported a "Play Sound Notifier" out of the box.