I was just looking today and saw this new piece that AirTran is going to have a sale on select Atlanta routes. I looked at Delta ATL-MDW and the ticket price appears to be matched that is $69 each way with tax.
With so many price increases coming at us, sometimes 2 or 3 per month, any kind of price match is great while it lasts! (also keep your eyes open for any kind of fare mistake from a fat fingered rep entering in the new codes!) – René