In Video Mode, you can select either Quick, Live, or Face focus. With quick mode, you can't be *recording* at the time, but while between recordings, you can hit the AF button (if quick mode is specified) and the normal SLR AF system will kick in. While recording, you are limited to a live mode. The live mode works fine for the family things, but acts like an AF system on a point & shoot digital camera. It hunts in low light or low contrast.
I just got back from a week in San Francisco, the video mode served me extremely well since I could take stunning video without the need for a video camera. Hooked up the mini-HDMI when I got back to a 1080p LCD, and it's incredible to come back from a vacation with incredible video. But, this is not a wedding videographer's primary camera! I used the Live mode, since hunting was OK for the few videos I was using on vacation.
The rumor about the firmware upgrade for more controls is bogus IMO. It won't happen.