I've got our old brick house connected via HomePNA. It works exactly like a regular NIC, except you plug it into the existing phonelines. I haven't done any speed tests on it or anything, but the only problem I had came when I hooked the NIC in after my modem. The modem has a digital feature where it disables the "phone" jack when you're online, to keep people from picking up the phone and disconnecting the modem. Obviously, having the NIC hooked to that jack didn't work too well. Once I moved some wires around on the back of my PC, everything was fine. I bought a pair of used D-Link cards from someone over at hardforums.com and later added on a Netgear card.