Don't know about Seattle but my ISP does run a transparent proxy that does mitm for http and caches files. They use http://www.peerapp.com/ http://www.peerapp.c

Don't know about Seattle but my ISP does run a transparent proxy that does mitm for http and caches files. They use http://www.peerapp.com/ http://www.peerapp.com/ devices to do so. I was also successful in poisoning their cache quite easily