I'm sure this has already been posted, but I finally got the rest of the information regarding the onboard check in for flights.
You must have at least one way transfers through
DCL from the port to MCO. You can have no more than 2 bags per person weighing no more than 50 pounds each (regardless of what your airline limit is). You must be flying out on the same date the cruise ends. And you must be on one of the following airlines: Air Tran, Alaska, American, Continental, Delta, Jet Blue, Northwest, United/Ted or USAir.
Getting this information helped get my butt in gear and I have finally bought my airfare! We'll have to drive to Milwaukee (probably do two one way rentals). I got pretty good prices and great times. No direct flights though, but I saved about $300 over the direct flights