You can pre-order online a CD of all the pictures for $100, or order at the end of your trip in the park or when you get home for $125. Or purchase individual pictures - but its pretty costly.
You walk up to a "photopass photographer" through out any park (ie: atleast 3-4 in front of all the park icons (castle, tree of life, etc.) in front of Tower of Terror, by most characters with in the parks, they will initially give you a "photopass card" - you always give that card to the photographer & they will just keep adding the pics on that card. They will even due "magic" photos......they have you cup your hands & will superimpose a pic of Tink in there, they have your group point to the ground & they will put Stitch in the pic, at AK they have you hold your arms like you are cradling a baby & they put baby Simba in there, etc.
When went in 2006 we have 150-200 pic's.
Then viewing from home you have the options to "add" borders, signatures of some of the characters, names of the parks, year, etc. and crop each pic. Basically you could double or triple the # of pics you have.
If you forget your card, just get another one. But they can not restore the pics w/out the # on the back of the card - so maybe write it down or take a pic of it.
Very worth it to get everyone in the pics.
You can then view at home w/the number on the card they give you