FWIW, when BPL becomes available, you will deploy it like DSL or a cable modem. A BPL modem will be attached to your powerline and a 10/100 Ethernet port will connect to your router/firewall device.
The ARRL has a page of tutorial info on BPL at this link.
If you want to hear what BPL does to your radio reception, there is a link with the
BPL sound over the radio here. This is what you will get in place of your favorite conservative talk radio shows.