I'm impressed with the power of the D7000's video modes. The AF-F mode (full-time video autofocus) seems to work very well. It has face detection that grabs a face and hangs on for dear life, even if the person is moving around (plus there are additional AF modes besides face detection).
You can force autofocus by moving the AF point square anywhere on the monitor and pressing the shutter release button down half way, without exiting video mode.
The autofocus makes some noise, although it seems quieter than my D300S. If you are serious about video, you'll still need to use an external stereo mic. The D7000 provides a stereo plug, unlike the D90 or D5000.
One thing I like is that the D7000 doesn't seem as prone to the "jelly wobbles" (CMOS rolling shutter) as most cameras. If anything it's even better than the D300S in that respect.
You can bet that I'll cover the Live View and Video modes in exquisite detail in my book. The video on the D7000 seems mature to me. I am now ready to start shooting some video for stock sales. This cool camera is the cat's meow!
By the way, I forgot to link to Berger-bros.com's website. Here it is: http://bit.ly/c1EDoi. Their phone number is: 800-542-8811
Give Brad Berger a call and let him set you up with a D7000. He got mine to me as quickly as possible, and I appreciate the good service.