He covers the G1 quite nicely from the point of view of using MF lenses and adaptors--though he is focused exclusively on the Cameraquest adaptors. In comments, I added the adaptor list here.
http://photo.net/equipment/panasonic/g1/review/index.published.adp
Diane
http://photo.net/equipment/panasonic/g1/review/index.published.adp
Diane