What am I doing about it?
I am shooting B&W film with my Ms where I can and shooting with a 5dII where I can't.
I have shot B&W film at up to 6400 and while grainy, there is something tolerable about it that just is not tolerable with poor digital high ISO, as long as the original scene has a low SBR and so able to cop with so much development. Its the organic/inorganic thing of gran vs. noise. With my 5DII, the high ISO is pretty darned good and converted into B&W the result is not at all bad. I am sure D700s and D3s etc do somewhat better on noise, but with less resolution, but all are well ahead of the M9 on noise.
I am waiting and hoping that the M10 will put the emphasis on noise and other aspects of utility, rather than megapixels. 18 is fine, but two more stops of high ISO would be a game changer and what a camera that would be!
While the M9 imperial guard will get all upset at the idea that high ISO on the M9 is 'not good enough', I don't see a whole lot of top notch pros using M9s in very low light and thats not because they would not want to! its undoubtedly a great camera for daylight HCB type shooting - comments often made include the lack of high speed emulsions during his day - but truth be told, everything has moved on since then, and the M9 needs to do the same. The Leica M used to be the best tool for low light work AND discreet street work. Now, the DSLR has well and truly overtaken in the available darkness realm. While DSLRs will keep getting better and the Leica M10 will still be behind, it might be good enough to cross that threshold of 'minimum utility.' Two stops will do it for me. A 5DII-like 1600 opens up all sorts of possibilities and I might not be an oldie, but I cannot make a SLR do what a RF does for street work. I am desperate for the Leica solution because I have eight lenses and four M bodies, all of them film!