I thought I remembered seeing something on digg.
http://iain.cx/articles/doorbell/http://www.compuphase.com/mp3player_en.htmProbably a little over kill but you'd just need to add a short song.
"Use switches to select tracks and settings: either one track per switch or have switches to move forward and backward through the tracks; a switch press can start playing a track, or the device may keep playing as long as a switch is being held down. You may also choose to play a random track, so that the audio effect is different each time that a user pushes the buttons."
So you could have it play a random song. Setup a timing circuit and you can have it only play like 5 seconds at a time.
"The digital I/O pins of the H0420 can drive LEDs or opto-couplers. There is intrinsic support for displaying output to an LCD."
