Olympus has announced their teeny tiny micro four thirds DSLR. It will only shoot 1280 X 720 @ 30fps, but Olympus is moving in the right direction in many ways with this little camera. Here they describe the dedicated movie switch.
“The E-PL1 is equipped with a dedicated Movie mode button to enable instant activation of 720p HD movie recording at any time. Even if the mode dial isn’t set to Movie mode, a quick press of this button allows users to switch seamlessly back and forth between still image and movie shooting.”