CM,

i don't fly airtran, but on the face of it, their ff program does look pretty inviting. they have the only program i know of where they invite you to fly on them, then take your free flight on a COMPETING airline.

here's the basics:

3 Roundtrips in Business Class
or
6 Roundtrips in Coach Class = FREE Roundtrip coach ticket on AirTran anywhere they fly

6 Roundtrips in Business Class
or
12 Roundtrips in Coach Class = FREE Roundtrip coach ticket anywhere in the U.S. where any major airline flies **(but cannot be on a competing route of airtran.) but that leaves some pretty good places like san francisco, las vegas, etc.