You may add both in-stock and out-of-stock items to shareable Wish Lists. You must have an account to utilize Wish Lists and the account is FREE.
Just click the Add To Wish List button on any details page and you will be prompted to Log-in or Create a New Account. If you are already logged in, on the details page, you may select from a pull-down list just above the Add To Wish List button. That's right, you can have many different wish lists and they are shareable on a wish list by wish list basis. You can create one list for people at work, another for family and even have the same items on both if you like. You get to decide which of your Wish Lists to share with which people. You can use this as a Registry for Birthday's, Weddings, Anniversary's, . . . whatever you like.
You can send a link for others to see one of your Wish Lists to one or more of your friends, family or share them with the world at your facebook page.
When your guests arrive, they can click to get details of items on your Wish List or add any number of in-stock items to a shopping cart for purchase.
When you log in to your account, there is a Wish List Tab where you can review all of your Wish Lists -- you can name them as you please and add your own description to each list. The links for others will display your name, the name of your Wish List and the description of your Wish List.
The Wish List page can be accessed by clicking the Your Account text link at the top right of the screen. Then click the Wish Lists tab -- and finally click the Details button of the Wish List that you want to review or amend.