1. A content and application delivery system comprising: an origin web site having an origin web server, said origin web server having a first memory for storing a first version of a web content; an edge server communicating via a data network with said origin web server and a policy control server; said edge server having a second memory for storing a second version of said web content and deriving said second version from said origin web server according to directives of a service policy that resides at said policy control server, said edge server downloading said directives of said service policy from said policy control server via said data network; wherein a request of a user directed to said origin web site for a resource from said web content is redirected to said edge server, and responsive to said request a third version of said web content is provided to the user from said edge server, said third version being derived from said second version in accordance with said directives of said service policy.