Have a look at the trailer for this feature shot with a GH2. It's amazing looking, very cinematic - and it seems that only three lenses were used.
According to the director, he used a Tokina 11-16mm 2.8 (Nikon mount), Nikon 28mm 2.8 and a nikkor 50mm 1.4 (all with a Nikon to M4/3 adaptor of course).
The results look stunning.
[url=http://vimeo.com/33025136]Musgo Trailer[/url]