A birdy told me that my local Best Buy will get the goodies today (Thursday, August 27th). The Nikon D300s and D3000 just came out of the box when I got there - they were still charging the batteries and I did not have a lot of time to change the settings - the videos were shot with whatever the default setting was right out of the box.
Nikon D300s and D3000 @ BestBuy:
This is how 7 fps looks/sounds like:
This is how the AF-On function works during video recording - basically you hit the AF-ON button during video recording and the camera autofocus automatically based on contrast-detect (a feature that the D90 doesn't have):
The jelly effect is still there: