http://www.summilux.net/r10/index.php?lang=en
Now that they are successful with the full frame M9, it seems a simple step to build an R10. It would be great for the brand and all the present owners of R lenses.
I keep hoping that's in their plans, but right now they are so busy catching up with orders for the M and S systems.
Let's hope down the road they decide to build the R10.