Fringe, a new series on the Fox network that is using a new format Fox dubs Remote-Free TV.
The episodes are longer than your average sitcom. The Wikipedia entry on the show states that this series will have less commercials and promos.
While this is true, one of the interesting bits is that before each commercial they tell you how many seconds should pass before the next segment starts.
Another interesting aspect of the series is how they identify each location during the episode. Often shows just print plain text on the screen, however in Fringe they use 3D text on the screen and it is oriented differently depending on the scene.