Quote Originally Posted by crimsondevil View Post
That site claims they are, anyways. They are supposedly generated from atmospheric radio noise. There are others that use radioactive decay events and the like - I read about one somewhere (can't find it now) where someone made a machine that rolled actual dice (in a hopper or something) for hours a day and stored the results for retrieval as needed over the interwebs.

That would be my thought too, but the random.org site says a plot of their results looks like:
In my experience with plots of a hundred or so 2-D random number pairs, there are almost always interesting patterns formed, whereas you might think they would be evenly spread over the area.