Au Bon Pain left.
But first, this is one of the nicer airports I know. I also like San Francisco's (museum exhibits in the terminal, nice Air Train to car rental, connection to BART (transit)) and Amsterdam's Schiphol and Frankfurt's airport (train stations downstairs!).
Sad news about Pittsburgh's airport: apparently Au Bon Pain pulled out of the airport in January 2010 and Nature's Kitchen replaced them. At Nature's Kitchen earlier this week, I ordered my food and asked for it on a paper plate, but my quiche (a triangle, 3 inches on a side) was served on a huge styrofoam dinner plate (with dividers, like a cafeteria plate) and a big plastic lid. Excessive packaging - all those hydrocarbons going to waste! And they microwaved the food on the styrofoam plate. Health experts warn not to do this - possible release of toxic chemicals when you microwave plastics. And the quiche did not taste fresh.
Two spinach quiches and a Snapple were $22. This is excessive. So much for "Regular Mall Prices ... Guaranteed" (the Pittsburgh airport mall slogan).
I like the airport but I don't like Nature's Kitchen. I want Au Bon Pain back!