Phoneline Networks?

styxlord asks: "Has anyone set up a Phone Line Network at home (or the office for that matter)? Do they work? How do they compare to 10Mbps ethernet networks? Are there Linux drivers for any of the major ones? Does it interfere with DSL or voice on phone lines? I've seen offerings from Netgear, 3Com,LinkSys, Intel and Diamond to name a few. One of these in the Linux box which is then connected to a cable/DSL modem would make a very nice gateway. "