While CES had lots of cool gadgets and toys there were a number of vendors showing products in the networking space. ZyXEL showed several diferent products including this one. From their press release:

The ZyXEL HomePlug PL-100 is an extended access solution that allows your house to be completely networked with existing power lines. With no need for additional wiring, simply connect the ZyXEL Home Plug PL-100 to an existing power socket, and it will transform your electrical power lines into a house-wide network infrastructure. It's the easy way to allow data and power to share the same power socket. Powered by HomePlug Turbo Technology, the ZyXEL PL-100 can achieve data rates of up to 85Mbps. The PL-100 allows users to surf the web, access e-mail and deliver large files easily and safely using a high-speed connection, and is ideal for home entertainment networking.