not exactly what you are asking for...
I have been experimenting with C-Mount and Super 16mm lenses on the 1 system, and have found it to be pretty interesting. You can get some fantastically fast glass - Fujinon makes a f/0.85 for example - that will give you a really blurred background and fast speeds. These lenses, however cool they are on paper, simply are not photographic tools on caliber with say, a Nikkor 50mm f/1.4, sadly. The bokeh, for one, is a bit - well - swirly.
That being said, I am waiting with great anticipation for my 9mm f/1.4 to come in, maybe I'll just call it a 24mm psudolux.