Well, I suppose the headline isn't really accurate, as the bus itself probably isn't atheist - it's just the advert it's carrying.
I was amused by the tale of Ron Heather who, as a Christian, felt that he could not drive a bus which had the Atheist Bus Campaign's advert on it. His employer has agreed to accommodate his request.
I can understand Ron Heather's strong feelings. If there were Nestle ads on Liberal Democrat literature, you can bet your life that there's no way I would deliver them. On the other hand, I opposed the idea that a registrar should be able to refuse to perform civil partnerships on the grounds that discrimination against people in same sex relationships has no place in a civilised society.
I have to say that I have never in my life looked at the adverts on the side of a bus and thought that the driver must use or endorse the products. However, I think the bus company have probably taken the sensible line in this case. The irony, is, of course, that the whole reason that the Atheist Bus Campaign started was, ironically, because of religious ads on buses posted by Christians.