When I'm feeling insecure about my own UI design skills, this list picks me up off the mat; somehow seeing precious pixel real estate littered with misplaced buttons, uneven gradients, random hues out of some 1970 shag carpet motel nightmare makes me feel... like not such a fucking idiot. Or maybe I'm kidding myself. Damn, I'm insecure about UI design.
I'm a little disturbed at how much material they have to draw from less than 24 hours into the existence of the Mac App Store.