2. A method comprising: identifying a collection of items associated with a user based at least in part on interaction by the user with an electronic marketplace; determining at least one of a recommended item, a category, or a tag that is associated with an item within the collection of items; identifying discussion forums associated with at least one of the recommended item, the category, the tag, or the collection of items, each of the discussion forums including dialog created by a plurality of users that includes discussions that are associated with the at least one of the recommended item, the category, the tag, or the collection of items; filtering the discussion forums based at least in part on an amount of activity of each discussion forum to reduce a quantity of the discussion forums to less than a threshold quantity, wherein filtering the discussion forums further includes: ranking the discussion forums based on recent activity in the discussion forums; selecting ranked discussion forums above a threshold rank; and filtering the ranked discussion forums to maintain a predetermined mix of the discussion forums associated with the collection of the items and the discussion forums associated with the at least one of the recommended item, the category, or the tag; and causing a display of the reduced quantity of the discussion forums with the items.
2. A method comprising: identifying a collection of items associated with a user based at least in part on interaction by the user with an electronic marketplace; determining at least one of a recommended item, a category, or a tag that is associated with an item within the collection of items; identifying discussion forums associated with at least one of the recommended item, the category, the tag, or the collection of items, each of the discussion forums including dialog created by a plurality of users that includes discussions that are associated with the at least one of the recommended item, the category, the tag, or the collection of items; filtering the discussion forums based at least in part on an amount of activity of each discussion forum to reduce a quantity of the discussion forums to less than a threshold quantity, wherein filtering the discussion forums further includes: ranking the discussion forums based on recent activity in the discussion forums; selecting ranked discussion forums above a threshold rank; and filtering the ranked discussion forums to maintain a predetermined mix of the discussion forums associated with the collection of the items and the discussion forums associated with the at least one of the recommended item, the category, or the tag; and causing a display of the reduced quantity of the discussion forums with the items. 13. One or more non-transitory computer-readable media storing computer-executable instructions that, when executed on one or more processors, configure a computer to perform the method as recited in claim 2 .