I think we can all agree that NASA needs to find a reliable source of funding, but I’m inclined to agree with the team at Engadget – Congressman Ken Calvert’s suggestion that NASA sell advertising space on their rolling stock is more than a little distasteful. But then, the marriage of corporate sponsorship and space exploration is almost inevitable, in a way, so maybe we should just get used to the idea. I can think of a fair handful of science fiction stories that have already suggested it.