ezGear has released the ezView leather case for iPhone ($40) which has an integrated stand for viewing videos and such in landscabe mode:
Constructed from high quality leather with precision stitching for durability, the ezView case is loaded with features. The slim profile of the case reduces extra bulk, while the velcro band allows the ezView to act as a stylish stand. With the ezView stand in place, users no longer have to hold the iPhone to watch videos or view what is playing. The flip-top cover also protects your device when the case is closed. Two low-profile rubber feet keep the case from slipping on any surface. Best of all, users never have to remove the iPhone from the case to access the controls or ports.