In addition to the hundreds of photographs and screenshots posted to accompany the release of the iPhone 3GS last week, iLounge posted new video clips comparing the performance of the iPhone 3GS video camera to two other types of video recording devices. One, a Canon PowerShot SD700IS camera, is designed to let viewers see how the new iPhone 3GS’s 640x480 camera compares to the 640x480 recordings of a three-year old pocket point-and-shoot camera.…