Where to eat in Pittsburgh?
I'd second Cure or Root. Both are BYOB. Salt of the Earth is on the top of everybody's list, but IMO either Cure or Root are on par, they just don't have a bar like Salt.
If you're looking for something a little more polished inside, Spoon or Eleven are excellent options.
Lunch in the Strip District or Market Square is fun. In the Strip, you can get some excellent street food, bahn mi from Lucy (not sure where her stand is these days) or tacos from the stand in front of Reyna's or some good simple seafood at Penn Avenue Fish Company.
Can also get some excellent mussels and tarte flambe at Park Brugge in Highland Park, but can be a bit of a wait there since they don't take reservations.