Buy.com offers the ZyXEL AV Powerline Wall Mount Ethernet Adapter 2-Pack, model no. PLA4205KIT, for $69.99 with free shipping. (newegg charges its newsletter subscribers the same via coupon code "EMCNDHJ69".) That's $10 under our March mention and the lowest total price we've seen for this kit. (It's a current price low by $37.) These adapters use your existing electrical outlets to create a secure high speed building-wide network. They support up to 500Mbps data transfer rates.