Sure i'll bite.
In the Mexican Día de los Muertos festival, Calaveras are used to decorate shrines to honour friends and family who have passed away. The festival is a celebration of people that have finished their lifespan, much like the dilapidated technology we all use (and bring back from the dead) to make music on. To celebrate with, even.
You know, calavera is just A skull, not a mexican (sigh) day of the dead skull...
(Dont get me wrong, I dig your screen name lots )