We did it on our Cruise back in 2011. Gave Customer Service a bag with Sharpies and about 5 vinylmations (1 for each family member) and they came back with everyone's signatures! Also, for something fun other than a book... I put a photo mat in the bag with the vinylmations, and had all the characters sign it. Then, we picked a picture out of all of us in front of the grand staircase on the Disney Dream, and used the autographed photomat with the picture. It turned out pretty cool. I just drew a line in pencil around the mat where they shouldn't write (because otherwise it would get hidden in the frame) and it turned out perfect. I might do the same thing for our Disney World trip this year, only use a picture of us in front of the Castle instead.

Other ideas that were brought up during our cruise planning were pillow cases, shirts, hats, etc... all kinds of things were being sent to CS for signing. Lol I imagined our Crew members down in the bottom, drinking it up and having a big autograph party the night before debarkation!