Here is the McDonald's basketaball website. http://www.mcdepk.com/2013allamericangames/media.html
The list is HUGE. Weird too, like only 1 from Nebraska, and 1 from Missouri. But a boat load from Iowa, Even a set of twins from Danville.
I didn't dig enough to see how you get on the list, but it seems the best basketball in the country is played in Iowa and Oklahoma.