I managed to get 8hrs with this camera and decided to pit it out with some possible wedding scenario shooting (eg ring shots). Its not an in depth review as others have done it. I was focused on run and gun shooting. All shots were hand held except for the night shots of the cars on tripod. Skip to 6:10 for the actual footages. No ND filter available so i tried what i could in broad daylight.

Certain shots were achieved with the eyepiece and zacuto rapid fire.
No post production was done at all for the FS100 shots.

Sony NEX FS-100 Review on Vimeo

YouTube - Sony NEX FS100 Review (http://www.youtube.com/watch?v=BYYC12gEq3s&feature=player_embedded)

Is anyone using the FS-100 for weddings?

Yes, I am. Awesome camera! It is not ideal if you are shooting with a long form doc style video in mind mainly due to the lack of a servo zoom. Much better suited for short form.