I take it you don't have a M4/3 camera and speed booster? What I'd like to see is samples, and to get an indication of what the widest usable focal length would be.
EDIT: I did some math, using a full frame 18mm still, and technically, coverage should be fine for GH3 video. However, based on the same test, the GH2's 16:9 should be fine too, so I'm not really sure what to believe.