1. A method, embodied in at least one computer system, for automatic association by said computer system of tags with received content items based on type of communication and content state in an activities oriented collaboration tool, comprising: receiving content items from a plurality of content sources at said activities oriented collaboration tool; automatically associating content type tags with corresponding ones of said received content items, wherein each of said content type tags indicates a content source from which a corresponding one of said received content items was received, and further indicates a current state of said corresponding one of said received content items; providing a top level content type tags view, wherein said top level content type tags view includes a list of content type tags automatically associated with received content items across all activities defined in said activities oriented collaboration tool, wherein said top level content type tags view enables a user to select individual content type tags from said list of content type tags automatically associated with received content items across all said activities defined in said activities oriented collaboration tool; and responsive to said user selecting one of said content type tags in said list of content type tags automatically associated with received content items across all activities defined in said activities oriented collaboration tool, displaying a list of those activities defined in said activities oriented collaboration tool that contain at least one received content item with which said user selected content type tag was previously automatically associated.
2. The method of claim 1 , further comprising: wherein said top level content type tags view additionally includes a separate list of user defined content type tags associated with received content items by said user.