yes, they will print your boarding passes. Just a warning. We flew with AirTran in august and when we got to MCO with our boarding passes, they told us it didn't matter that we still had to wait in the HUGE line to check-in that they didn't do on-line check in. I looked outside and saw they had curbside check-in so we just took the luggage outside and we were the 3rd family in line.
It was the first weekend after the new security rules so I am not sure if that had anything to do with it or if we just got a clueless gate agent that didn't know about on-line check-ins. Curbside was a breeze!