Thanks, Colin, Chuck.
I have full control over which way the camera points - I can't see the viewfinder, though, so actual aiming is not a thing of precision - via radio control. I use the same radios the model airplane guys use.

I can turn the camera 360*, and tilt it from looking straight down to looking straight out to the horizon in a second or two. When things look lined-up, I hit the shutter.
Detail of the shutter control, essentially a mechanical finger:

On top of the rig is a cross - it's called a "Picavet", after the guy who invented it 125 years ago - and the ends of the four lines running through the pullies all gather at two points, which attach to the kite string about three feet apart. This allows the camera to remain more-or-less level, no matter the angle of the kite string.
We get our kite-photography specific gear from Brooxes:
http://www.brooxes.com/newsite/HOME.htmlIt's not as tricky as you may think. Give it a try.
Since I can't see the viewfinder when I'm snapping shots, I try to take as many as I can, relying on both luck and the miracle of the 8gb photo card. If I'm lucky, I'll have several hundred shots to sort through. Sometimes, I'm fortunate to get only a few before the kite's grounded. That was thye case at Gas Works Park, in Seattle. I think I only took a dozen shots that day before the winds got too squirrelly for safety, yet I got a "keeper" on that roll!
I put my kite photos on Flickr:
http://www.flickr.com/photos/30901290@N03/I have six KAP ( kite aerial photography ) kites, and I've used five of them to get photos. Three are deltas, ranging from 9' to about 4'. One is a parafoil, 16-square-foot, and two framed-type kites; a Dopero ( about the size of a king-sized bed ) and a Fled.
This is the Fled:

It's about 5x6 feet.
The different kites are for different wind conditions. No one kite works everywhere, all the time. The same kite that lifts the camera beautifully in a 5-knot wind ( the Dopero ) would be ripped to shreds in a 30 knot wind, where my smaller delta excells. That 5-knot wind wouldn't be enough for the smaller delta to even lift it's own string.