I had my HR21 networked using a Buffalo wireless ethernet converter, but was having problems with the RF path (it is about 60 feet through several walls and I suspect the insulation is foil-backed). I was getting limited success with On Demand and music and pictures with Media Share, but Media Share video files would not transfer smoothly. I felt the need for a better connection but running a CAT5 cable would be somewhat difficult (working in my crawl space in the winter is not something I relish), so I decided to order a set of the new HD DVR Networking adapters. This kit uses ethernet-over-powerline networking as an alternative to a direct ethernet or wireless networking. A basic installation requires two adapters, but it appears that up to 16 devices can be networked. They use HomePlug® technology and are rated at 85 Mbps. There are two models available, a basic one ($24.99) which plugs into a standard wall socket and has a RJ-45 ethernet connection and a powerstrip model ($54.99) which incorporates six extension sockets and surge protection. A CAT5 cable is included and the price includes FedEx shipping (the units arrived in a couple of days). The manufacturer is tii network technologies. A data sheet for the basic model is at http://www.tiinettech.com/datasheets/Home_Networking/HNX-ET_IDS.pdf and for the powerstrip version at http://www.tiinettech.com/datasheets/Home_Networking/HNP6L-ET_IDS.pdf. Since I was a bit stretched for power connections at both locations, I bought two of the powerstrip models. They appear to be quite solidly constructed. No configuration was required and I was able to get my HR21 networked in practically no time (I had already set it up using the Buffalo wireless converter). There was an enclosed CD with a manual and a Windows program which can be used to add an encryption password to the device (which might be advantageous in a multifamily dwelling). If encryption is used, it must be applied to all powerline devices in the network. The units have been working for the past three days without problems for both On Demand and Media Share (including video files).