5D ii 2 Live View questions
2. Isn't live view the same as mirror lock-up for purposes of reducing camera vibration while shooting on a tripod?
Actually, it has been shown that Live View is better at reducing tripod vibration than mirror lock up by itself. That's because Live View uses an electronic first curtain shutter to start exposures. A traditional mirror lockup exposure would still use a mechanical shutter to start exposures.
Do note that Live View heats up the sensor quite a bit, and therefore increases noise.