Oly Pen F/FT lenses on M4/3 bodies?
Yes, I have 25 2.8, 40 1.4, 70 2.0 and 150 4.0 on my GF1. Very often I walk with a kit combined of 2 or 3 of these lenses. Well, I have to admit, I bring also Pan 20 1.7 in the company. I am pleased with the image quality, ie. sharpness, bokeh, and the ability to control picture taking process. Certainly, they are not for action shots. It's important to avoid direct sunlight on the front glass, as the coating is from the first generation period.
AFAIK the Pen lenses have been some kind of collectors item, but at the arrival of m43 their prices became even higher. As I can see on ebay you can find them only from time to time. There were a lot more even half a year ago, but probably most of them found new homes.