Currently the search on the top left gives you only the option to search for messages using a free input search field. However, it would be nice if it provided some sub-categories, like searching for messages or people. (The people search would be a handy complement to #, in which private discussions could be started with multiple people by choosing names from a list of people).
Additionally a search in the form of a tag cloud would also be useful as a way to see existing tags and how frequently they are used, allowing the user to click on a tag and see corresponding messages, as an alternative to searching by tags.
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