I believe "normal" developer points can be rented, but not banked or transferred, but could be used at any DVC resort, etc. "Restricted" developer points like those offered recently with AKV add-ons can only be used for stays at SSR and the Disneyland hotels, and not banked or transferred. It may be possible to trade these "restricted" points through II too although I haven't found a definitive answer on that one.