You people with size 12-13 have it easy - I wore 12-13s when I was 12 years old, and once I hit 13s, it started getting harder to find shoes.
Now that I wear 15s, finding ANY shoe that's I wouldn't be embarassed to wear outside is getting near impossible.
I've completely given up on Nike - I haven't seen a plain white or black tennis/running shoe in men's sizes from them for a couple of years - it seems they think that everyone on the planet MUST have a splash (or downright full coverage) of some nasty flourescent color. In fact, many of their Bball shoes seem to try to fit as many clashing colors as possible on one shoe. I'm waiting for them to only off mismatched-color pairs of shoes soon, where Left has 4 ugly colors, and Right has 5 completely different ugly colors.