I was in York this afternoon and set the X Pro-1 to shoot RAW+jpeg and film simulation Monochrome+Green filter.
This gives you a mono image in the EVF making it very easy to to shoot in B+W. Obviously the RAW file remains in colour.
If any exposure compensation is dialled in then this is reflected in the EVF, all very easy.
These two images are jpgs from the camera with some tweaking and resizing in Ps.