If you still want those odd Polaroid colours and film shape, then Polodroid is free bit of software (for Apple and PC) that will convert a digital image into retro looking Polaroid picture - right down to having to wait for picture to develop, yeah you can shake it like a polaroid picture too..
http://poladroid.net
iPhone users can get similiar application called CameraBag (get from AppStore) which converts iPhone photos into not only Poloroids but also to other types of retro films including Helga, Lolo, 1974 film stock amonst others. More about that application at www.nevercenter.com/camerabag
