Curling and Flat irons are allowed according to the response I got back from Disney.
7/25/11
Dear Melissa,
Thank you for choosing a
Disney Cruise Line vacation!
I would be happy to assist you.
Curling irons and flat irons may be brought onboard as long as they
support the ship's electrical system.
You will find your stateroom to have the following electrical outlets:
-Two (2) 220V and two (2) 120V outlets are located at the desk
-One (1) 220V and one (1) 120V outlets are near the bedside table
These universal plugs will accommodate both 120V and 220V electrical
plugs.
I hope this information has been helpful. If you require further
assistance in planning your visit, please feel free to contact us.
We look forward to sailing with you!
Have a Magical Day!
Stephanie
Reservations Department
Disney Cruise Line