I was pretty impressed with Obama's inauguration speech. He almost slipped by without using the word 'terrorist' or any of its relations (he used 'terror' once) and he gave respect for science and rationalism a shot in the arm by appealing to data and statistics:
He almost did right by the rest of us by referring to those of us for whom faith is not a concept, although he used a term which centres on faith. One can be sure that every word in the speech had a great deal of thought behind it, and that every word was balanced with its synonyms. We can infer, therefore, that Obama's team considers atheist as being in some way wrong. It is arguably the most accurate term, and so it must be wrong for political reasons. Perhaps 'unbelievers' is a way of being inclusive while still indicating his theological position.
Naturally, Neoformix has the whole thing in perspective.