Is there a service provider that offers cable through broadband?

I currently pay for Cablevisions IO triple play package. It costs 29.95month for all three services (cable, internet, and phone). My setup is a 42″ LCD TV with surround sound hooked up directly to my computer with an RGB cable. My cable comes through the regular cable input. So it’s easy for me to watch streamed content from places like hulu, youtube, and such without needing any extra pc card or splitters. What I want to do is cut costs of my services. I can buy broadband from another carrier (AT&T costs 19.99month) buy a Magic Jack for my phone (39 and changeyear). Is there a cable company that streams channels over broadband like the companies that use voip over the phone (magicjack/vonage)? I’m not looking for anything for free, just cheaper with no equipment to buy with a good range of channels. Does anyone know of such a service? Thanks in advance.

I use Packet8 and MagicJack for a cheap 2nd line!!