Harlan Yu has a good post on Freedom to Tinker, explaining why Phorm is worse than I had realized.
New technical details about its Webwise system have since emerged, and it’s not just privacy that now seems to be at risk. The report exposes a system that actively degrades user experience and alters the interaction with content providers. Even more importantly, the Webwise system is a clear violation of the sacred end-to-end principle that guides the core architectural design of the Internet.This is a deal-breaker. If Comcast starts providing this "service," I will be moving to a new ISP (and a new video provider).