The folks over at Engadget HD have reviewed the Netgear MCAB1001 MoCA Coax-Ethernet adapter. They do a great job at simplifying the concept and describing how the technology works.
This is a new device so we think a little introduction is in order. While this little box looks like a switch it’s really a bridge, in fact it is a Ethernet to coax bridge. You need two devices to get started, but can use up to 16. Each one has two coax connections and one Ethernet. The coax acts as a pass through so you can continue to use the coax cable for its initial purpose — you know cable TV or an ATSC antenna (not compatible with satellite). With these you can add a network connection anywhere in your house you have a coax cable running.
They give it a rave review, saying that that it works exactly as advertised without the pain of dropouts or weak throughput that powerline and Wi-Fi have. Pictures and a screen shot are included in the review, so, if you want to check it out, go to Engadget HD.