While not perfect, the Actiontec PWR511K01 for now offers the best value among power-line adapter kits on the market.
Create a power-line connection with Actiontec 500Mbps kit
TRENDnet TPL-407E2K Powerline 500 AV Nano Adapter Kit TPL-407E2K
Actiontec PWR511K01 500 Mbps HomePlug HD Powerline Wall Plug Network Adapter Kit (2 Units) : Electronics
Best Buy: Actiontec 500 Mbps Powerline Home Theater Network Adapter Kit White PWR511K01
Fast, Easy Wired Networking, Use Actiontec's 500 Mbps Powerline Network Adapter to connect home theater devices like your Blu-Ray and Gaming Console
Actiontec 500 Mbps Powerline Network Adapter Kit
Powerline Computer Network Adapters
Actiontec PWR511K01 Powerline Network Adapter Kit Up To 500 Mbps
Create a power-line connection with Actiontec 500Mbps kit
ZyXel PLA4231 500 Mbps Powerline Wireless N Extender review: Good, but not quite good enough - CNET
Actiontec 500 Mbps Powerline Network Adapter Kit (PWR511K01) review: Small, fast, and affordable - CNET