Also check out Disney's PhotoPass. Disney has photographers all over the parks and hotels at prime photo spots. They'll give you a card which becomes your Photo Pass id. You can access all your photos online. Check out this site for more info.
http://allears.net/tp/ppass.htm
Ordering prints is expensive. I'm talking $12.95 for a 5x7. But you can buy a CD with all your photos on it, then get them printed at Wal-Mart or anywhere else. And if you buy it in advance, you save $50.
http://www.disneyphotopass.com/previsitoffer.aspx