huckster - we just booked our flight for September directly through Spirit (from Detroit Metro) $236.50. I checked every airline that flies from Detroit to Orlando and the next cheapest was Northwest at $290 with one stop. I had checked expedia, cheap tickets but their prices were all $290 and up.
I just checked SpiritAir.com (from Detroit) and Sat-Thurs (9-13/9-18) is $258.50. If you fly to Orlando on Sat (9-13) and fly back home on the following Sat (9-20) it's $236.50