You have to ask what is the point, looking at the weight and dimensions it's hardly a massive difference compared to the E-420!

E-420 - 129.5 x 91.0 x 53.0mm weight 380g

Lumix-G1 124 x 83.6 x 45.2mm weight 385g

It's actually heavier. only half a cm narrower, not quite as high or as deep.

the worst thing though it that it's an ugle b*gg*r! I was hoping for a nice sleek design like some of the mock ups we've seen.

Very disapointed!