I experimented a little more last night with the GF1 and my Jupiter 8 lens and a few more shots this morning with my Industar 61 lens.
Just as I thought I was getting to grips with the camera it started making no sense. At one point it appeared as if one could jump from from underexposed to overexposed in one f-stop increment (!?). Maybe I was just tired!
Obviously, more experimentation is required but I did manage to get some interesting shots:
Jupiter 8 Lens
Industar 671 Lens
My GF1 Flickr Set.