A quick search of their website would have told you that they have XM Satelitte radio as their main entertainment source.
http://www.airtran.com/inflight_entertainment.aspx
I second the portable dvd player. I use my laptop and the flight goes so much quicker....
Duds[/QUOTE
They have never offered headsets on any of the Airtran flights I was on. We always use our DVD. Love it.