I have a spare Hexanon 57mm f1.2 which I am willing to sell for use with any 4/3rds camera (although it works best with the G1 + 4/3rds adapter).
This is the ultimate portrait lens for 4/3rds imho - the bokeh is sublime, lovely depth of field control and here are a few example images taken with Olympus E-400 and Panasonic G1 cameras.
Olympus E-400 :
Panasonic G1 :
Price £200, delivery included in the UK... charged at cost for worldwide.
The conversion for 4/3rds use is using Pete Snaar's method here :