The aviationinterviews.com data may seem old, however, the last one posted (interviewed on Jan 24th or so) was one of the more recent AirTran interviews. Those that interviewed on or around that date are just now in training. The interviews that are coming up next week are the first that AirTran has conducted in many months.
I believe the process is still the same as what is on the aviationinterviews.com site.