11. The method of claim 8 , wherein the sorting comprises: identifying a list of items previously displayed to a user in a stream, the list comprising identifiers for each of one or more previously displayed items; identifying the one or more of the one or more items that have identifiers listed in the list of items; and moving the identified one or more of the one or more items below the one or more items, such that the one or more of the one or more items are sorted further from a top with respect to the other items of the one or more items.
8. The method of claim 6 , further comprising: sorting the one or more items; and providing the one or more items according to the sorting.