1. A method, comprising distributing, from a policy distribution server to one or more network intermediary devices communicatively coupled to the policy distribution server, on a subscription basis, policy updates to effect desired behaviors of at least one network intermediary device from the one or more network intermediary devices, wherein the policy updates include instructions for data collection by the at least one network intermediary device, and data collected in accordance with said instructions are used as feedback to tune caching policy updates for the at least one network intermediary device that supplied the data collected, and wherein the nature and frequency of the data provided via this feedback process is subject to control of said subscription basis, and the tuned caching policy updates are distributed from the policy distribution server to the at least one network intermediary device.