The interface shows the normal iPhone camera interface but with a switch on the bottom right which toggles between still camera photography and video recording. The video recording is not presently functional in iPhone 3.0 beta, and the interface is not accessible by default. Only when configuration files were modified telling the firmware that a Video Camera was present will this interface appear.
Other interesting capabilities found in the configuration files include "auto-focus camera", "magnetometer" (digital compass), and "Voice Control".
It is expected that the release of the iPhone OS 3.0 will coincide with a hardware update to the iPhone.