Whenever I install a new hard drive, pointless ritual dictates I must give it a new custom icon. Not being artistically inclined (as evidenced by the site you're viewing), I often lend myself the use of the fruits of other artists' labours. That was an entirely pointless sentence, as was this one. You know what, forget this whole blasted paragraph. It never happened.
On the left is the default Mac Pro icon in OS X, the right was drawn by Parthiban Mohanraj entitled The Anodized Behemoth over at DeviantArt. Apple should hire him for all the icons in 10.7 Lion. Given their less than attractive new iTunes icon, they desperately need him.