If you haven't seen the documentary Helvetica, I recommend it. It's the nerdiest thing I've seen in a great while, and has an excellent "post rock" soundtrack by El Ten Eleven.

Dulles Airport in Washington DC boasts an example of signage that departs from Helvetica, and I think the results are dated and yet delightful, see right.

Yes, it reminds you of riding Disneyland's Space Mountain in the 1980s. But really, what's wrong with that? If more people could reclaim the sense of nostalgic, childhood wonder they feel when riding in a big improbable contraption like a jet plane, wouldn't airports be a nicer place for everyone?