The Green Button.com has a good thread going on the topic, "What makes a good Media Center Book?"

We need more books on developing applications for Media Center in my opinion.  I see that Intel has a session planned for IDF on creating 10' applications (aka Media Center applications where you're 10 feet away from the display). One would think this is a well-explored area, but with the advent of 16:9 TVs with much higher resolutions than the first-generation of "interactive Television", there are a number of new UI techiques and remote-enabled applications just waiting to be explored.  Time to give the good folks over at MS Press a call and make a few suggestions ;)