A Helpful Hint (maybe)....

If you purchase a gift from someone's wish list, it is possible for you to cross out that item (to indicate that no one else should purchase that item), without removing it from their wishlist.  Just click on the "edit" pencil under that individuals wishlist, up will pop the wishlist with an edit bar above the words/box.  Highlight the item you have purchased and click on the "ABC" icon in the menu bar and then "publish post."  The individual will not know who purchased that item and it will save on duplicate gifts (unless of course you don't mind getting duplicates so you have something to re-gift).