This is kinda interesting, but only somewhat. Western Digital has entered the media player game, but in a limited fashion. This box, the TV HD Media Player, takes your USB stick/hard drive and outputs the content on those USB devices via HDMI to your TV @ 1080p.
The price is decent, but for the same or a bit more, you can get into the Media Center game in a bigger way. There is a plethora of media players you can get, including Mvix, Neuros, and quite a few other open source ones.
(Please note prices are subject to change and the listed price is correct to the best of our knowledge at the time of posting)