There is a very smart guy who made a long list with all Panasonic G1 -GH1 adapters. Now you got the power to use quite alle the lenses ever made from any company!!! Ok for most solution you have to use two adapters but isn’t that the right step to our goal of complete world domination? ;)
Panasonic-User BjÃ¶rn Viztyger compared the sensor from the new GH1 with the older G1. It seems like the Panasonic GH1 features 1MP more.