Quirky has made some of the coolest gadgets and off the wall products I have seen over the last few months. The latest product to come from Quirky is for the iPhone 4 and is called the Tilt.
The Tilt case has a flip down section that can be used to prop the phone up in portrait or landscape modes. The case is offered in black or purple/white colors and the thing is a bumper style case. It should keep you from blocking the antenna and help reception too.