It was also reported by AP,
here is an english language copy I found via google.
I think the title of this thread is misleading. ATL did not 'refuse' the A380, they said that right now the cost of upgrading the airport is not justified. Let's not get too excited by such a thing, it's not like the A380 will be visiting every airport in the world. Yes. I know ATL is an extremely busy airport, but it is mostly domestic and Caribbean flying that is done there.
If you want to read an article that shows the Americans are ready for the A380, you can read
this article instead.