NBC has posted high definition trailers for some of their fall programming on Xbox Live. You can get an early look at 30 Rock and Kidnapped, or existing shows Conan O'Brien and The Office. They've even got a behind the scenes look at NBC Sunday Night Football up for download. All are listed at 720p but the quality varies. While the Kidnapped, 30 Rock, Conan O'Brien and Sunday Night Football promos feature the kind of quality we expect from our HDTVs and Xbox 360s, The Office is strangely blurred. It's hard to say if it is just a problem with how it was encoded or if it is an upconvert of a lower-res source, but while not as bad as the Battlestar Galactica episode last week, since The Office is filmed entirely in HD we wouldn't have expected this problem.