We are talking about old house cable here ....you know OLD TELEPHONE CABLE not Cat5/6 !! but the cable installed prior to the 1990?s ( single pair)
Most home owners will not get 100Mbps from Old home telephone cable unless its Cat5/6 ( new Cable)
What I am saying here is 802.11n/g wireless (Wifi) is the most economical solution where the existing cable is not up to standard. When Wifi is used home owners can achieve between 25-35Mbps speed with is perfectly suitable to stream HDTV in fact some new TVs have this option built-in
So if you or anybody can top 55Mbps (802.11n/g wireless) using Old telephone cable and do it for less than $100..... then stand up and show us ( VDSL/SHDSL does not qualify)
Lets see it.