William, In response to a question on P2P caching, you answered "PeerApp can do that but probably doesn't suit the scale you are looking at." PeerApp is the most scalable P2P cache in the world, and can handle hundreds of Gb per second of bandwidth. Their largest deployment in Taiwan handles 120Gbps with no problem. The next largest competitor, OverSi, can barely handle a tenth of that. Where do you get your information that PeerApp "doesn't suit scale"?