If you're using the new Leopard system (reviewed here), and connect your Mac to a network with Windows PCs on it, the icon that will represent the PCs is a monitor with a BSOD ("Blue Screen of Death") on it (see the image on the left, named
Of course, all Apple users believe their operating system is better than the competition. But this, too me (a Mac user and a Windows developer) looks extremely smug and childish.
And of course, there remains the point that this would have been much funnier, had Mac OS users haven't experienced BSODs of their own when first installing Leopard.
If you have Leopard installed, and like me, you think this icon is immature, follow the steps outlined here to change the icon.