Wireless at airports isn't free. It cost me $8 for 24 hours of access at the ATL airport when I was stuck there last year.
If I weren't stuck at ATL overnight, I sure wouldn't have spent the $8.
Convenient though... I was on the phone talking with a girl, so since I thought going in the trolley might ruinate my cell phone reception, I walked all the way to the main concourse (even up and down the stairs) all the way from concourse D. Long fucking way.The underground trolleys are fun for only so long....