I'm just going to answer the deserted island question so here it goes.
Edward: Piano, music collection, and stereo
Bella: human food, her Jane Austen Book with collection of her stories, and Wuthering Heights (read my one-shot
WHEN HE WAS GONE)
Jacob: A car he can take apart and put together again, a bike he can do the same with, and human food.
Alice: A computer, catalog and television so she could shop.
Jasper: A hat, a bat, and home plate.
Emmet: A television so he can keep up with all the football games, a football, and a baseball
Rosalie: A book of Dog jokes so she can get back at Jacob, a car catalog, and a nicer car than Jacobs that she could work on.
Carlisle: first aid kit for Bella, one of his biggest and oldest books, and a desk.
Esme: Three things to keep her children satisfied.
Edward and Bella would probably do something cheesy and say that they only needed each other though.