With “Media Extending” you store all your digital media on a Media Center PC — photos, music, videos, live and recorded TV — and bring it all to life throughout your home through a piece of hardware that displays and controls your central Media Center PC.
One of the other reasons I chose GB-PVR as my TiVo-like software solution was it's ability to be controlled via a relatively inexpensive piece of hardware called the MediaMVP. The MediaMVP can be picked up for about $90 and provides remote access to all your recording, MP3s, photos, etc. that are stored on your GB-PVR enabled PVR.
So, in my case, my main entertainment center in located on the top floor of my three story home, and I have a small 17” LCD TV and bookshelf audio system on my 1st floor. By running a 100' ethernet cable between the two floors, I am able to stream nearly everything from Live TV to recordings to Internet radio. Currently, I'm in the process of running a second set of audio outs from my MediaMVP to the radio in my kitchen so I can listen my favorite on-line radio station woxy.com throughout the house.
The MediaMVP isn't the most reliable piece of hardware out there, but since it takes a only a few seconds to boot-up, it's hardly a hassle when it locks or resets. (Which only happens about once a week.) Other than that, the S-Video output is pretty good, and the remote is the same one that came with the PVR-150 so the human interface looks just like my my main PVR.