Just got my new GH2 so I took the ferry to Manly. Some thoughts:
It's nice to have a click instead of the clunk of my 5D mkII. It works well in good lighting and the 14–140 is compact compared to its Canon equivalent. The camera fits well under my jacket in the rain.
Cons, the zoom is the opposite direction as my Canon lenses, so I'm zooming when I want to go wide angle. Whilst the zoom is smaller than the Canon equivalent it still isn't that discrete. Quality drops off quite quickly once the light drops off. I'm not so happy with the default 4:3 ratio of the images.