Powerline ethernet adapters are theoretically the perfect approach to retrofitting an existing building with wired ethernet. The premise of being able to simply plug two adapters in to the existing power outlets and instantly have a wired network covering several hundred feet has a great appeal. The Trendnet TPL-401E2K Powerline AV Adapter Kit is a product that looks to provide this functionality and at the same time promises speeds of up to 500Mbps. We take a quick look after the break.