Devolo is marketing a MicroLink dLAN series of adapters which caught my eye.
They don't seem to be available in the States quite yet but when they are, it will solve a lot of people's issues.
UPDATE: Expansys carries just the LAN starter kit for $209.95 Amazon.co.uk sells a wider range and they do ship to the USA with no problems. Meet:
MicroLink dLAN Highspeed Starter Kit
The MicroLink dLAN Highspeed Ethernet is the first product to offer data transfers at up to 85 Mbps over the household power circuit. This new high-speed generation of devolo dLAN adapters now opens up a whole new range of possibilities. The new high-speed standard ensures that PCs can even exchange large files via the electricity supply without long waits. Even videos in DVD quality can be sent through the household electricity circuit. In combination with IP-TV, video on demand is an impressive experience anywhere in the home - wherever there's a power socket.
And for Audio, check out:
MicroLink dLAN Audio
MicroLink dLAN Audio combines the technologies of HomePlug and MP3 to offer you many advantages for convenient music and speech transmission on every floor, in every room. This product lets you enjoy music in stereo quality from any power socket - quickly and flexibly - with audio data rates of 44.1 kHz. You don't even need a PC to transfer audio data - just plug and play. Your hi-fi can send music to active loudspeakers in another room, or play MP3 files received from your computer or Internet radio stations.
The dLAN Audio comes with 2x line in, 2x line out, 1x SPDIF in and 1x SPDIF out (digital). Very cool -- saves running wires all over the house and doesn't poop out when you use the microwave or a 2.4GHz phone...
