1. A computer-implemented method for computed relevance messaging with remote attributes, comprising the steps of: communicating, by a first agent, computed, measured, or remote properties and a relevance expression to one or more other agents; said one or more other agents evaluating said relevance expression to determine whether said communication is intended for consumption by the one or more other agents; when said communication is intended for consumption by the one or more other agents, the one or more other agents: determining relevance based on said computed, measured or remote properties; taking one or more actions based upon said determining relevance; and reporting results of any of said evaluating, determining relevance, and taking one or more actions to a management system; wherein communicating said computed, measured, or remote properties and relevance expression comprises any of the steps of: said first agent posting said computed, measured, or remote properties and relevance expression to a central bulletin board accessible by said one or more other agents; said first agent broadcasting said computed, measured, or remote properties and relevance expression to said one or more other agents; said first agent requesting said computed, measured, or remote properties directly from said one or more other agents; said first agent requesting said computed, measured, or remote properties directly from said one or more other agents along with a condition that said one or more other agents send the requested computed, measured, or remote properties in response to a particular trigger condition; and said first agent sending said computed, measured, or remote properties and relevance expression to a central server through a relay hierarchy and said central server delivering through said relay hierarchy said computed, measured, or remote properties and relevance expression to those agents, of the one or more agents, that are targeted by said first agent in said properties, wherein said delivering is achieved by comparing said properties to exposed properties at said central server, wherein exposed properties are properties previously communicated to said central server by any agent; and wherein said first agent broadcasting said computed, measured, or remote properties and relevance expression to said one or more other agents further comprises said first agent broadcasting on a local network and wherein said one or more other agents are proximate to said first agent.