[Newegg] Newegg • Tenda P200 Powerline Mini Adapter Kit • $33/pair including shipping
I ordered a pair of these a few days ago. They just arrived and I'm impressed with how easy they are to set up. Basically plug each unit into an AC outlet, connect it to the device using Ethernet cable (supplied), wait for the pretty lights to come on, and start sharing data. If you want to get fancy there's a Windows app that lets you encrypt data, set QoS (prioritize traffic), etc. But it's really not required because your traffic stays within the AC cabling in your house. You can add more Powerline adapters, either more of these or any HomePlug AV standards compliant adapter. Speeds are comparable to or faster than WiFi.