Hi, Rebecca!
Once you pre-register for Disney's PhotoPass, you might want to take a look at
this link for Disney's PhotoCD pre-order discount. If you are planning on purchasing many of the great pics that Walt Disney World professional photographers are sure to take of you and your family, this significant discount is the way to go. At the time of this writing, you can pre-order the PhotoCD for $99.95, instead of the regular price of $149 if purchased after your vacation. Should you wish to pre-order Disney's Ultimate Memory Package, you'll receive the PhotoCD
and Disney's Photo Book, a "souvenir keepsake of your Disney memories" for $149.95, instead of the regular price of $229.90.
For our upcoming three-generation trip to Walt Disney World, I'm taking advantage of these discounts! This will also encourage all of us to stop for a picture when the opportunities present themselves, since we know that those photos will be ours to keep upon our return, rather than the usual "we'll stop on our way out" or "maybe tomorrow." Knowing that we've prepaid for the pics will allow me to remind everyone that we'll be glad we stopped for a professional photo as often as we did.
Whatever your decision, have a wonderful vacation in Walt Disney World! Send any additional questions you may have as you think of them! We love to help!