well theres a computer that functions as a tv tuner thats hooked to my dsl modem....http://www.cavtel.com/broadbandtv/DSL_tv.shtml
theres an example of it. the tv thing works pretty good but every time you use the remote to change a channel or a function the signal has to go all the way back to the server at the phone company office and then all the way back and it takes a couple of seconds to execute.
i think some of the big phone companies (verizon is one) are going to start trying to sell this big time which may turn out to be bad news for cable and satellite companies.
it has turned out to be cheaper then direct tv.