We were on the Disney Magic on the September 12-19, 2009 Cruise.
Here are some of the changes I noticed since we sailed in September of 2008.
Check-In
Your number for boarding the ship is not given to you when you enter the terminal. It is given to you when you get your photo taken. (See below).
You do not need to complete the customs form on check-in as you have had to do in the past.
After you check-in, your photo is taken and stored in the ship's computer. When you come back on the ship at port, they compare the photo on your picture ID with the one in the stored in the computer.
Castaway Club--In the past, you were given not only lanyards but a couple of pins per lanyard to trade. This time we received only lanyards.
Ship
All rooms have flat screen televisions.
There are 2 sets of movie channels on the televisions in the rooms.
When photos are taken, the photographers ask to scan you Key To the World Card. You can then view your photos at a kiosk near the staircase by the Promenade Lounge.
You no longer have to clear customs before anyone can get off at St. Thomas. As anyone who did the Eastern before remembers, if you went to St. Maarteen prior to going to St. Thomas, everyone on the ship had to clear customs at St. Thomas (which meant the entire ship had to arise at about 6:30 a.m.). That has stopped.
Bingo
The ship now has electronic Bingo cards in addition to paper ones.
The Stack
The age range has changed. Previously, a child 13 and older could go to The Stack, and you could continue to go there through age 18. Now, the kids have to be 14 to go The Stack and the upper age is 17. A number of the activities that the kids in The Stack are now done by the 11-13 year olds
Shows
So far as I know they have added any new shows, but have updated the current shows a bit by adding or changing some of the songs: however, Disney Dreams, so far as I remember, has not changed at all.
I believe those are all of the changes.