I am still evaluating a Mac mini under the TV and decided to give Plex a go.
Plex bridges the gap between your Mac and your home theater, doing so with a visually appealing user interface that provides instant access to your media. Plex can play a wide range of video, audio and photo formats as well as online streaming audio and video. The real power of Plex is found in its library features: Organize your media into versatile libraries, automatically retrieve metadata from the Internet, and display your libraries using one of the visually stunning skins.
One way I have heard it described is, Front Row on steroids!
To get the most from it though I do need a much faster internet connection, one day soon I hope.
It installed fine and I immediately installed BBC iPlayer. Hoping to get more done with it over the next few weeks.