I have since 7 years a MiniDV-camera, on which I always use the format 16:9. Sometimes when the VideoCamera is not available I use my DigitalCamera and take film with that, but it can only take 4:3. Of course the quality is not as good as with MiniDV but it is accepatable. I later convert the film to AVI on my PC and insert it in the AVI-file from the MiniDV.
Now I wonder is there some Still digital camera that uses 16:9 for filming?