It appears that Walther has decided to outfit the .22lr version of the M&P with a manual safety and although it is hard to make out; it also appears that there are no interchangeable back straps. (but there might be) I first spotted this on Guns & Coffee blog. They also comment that it may be made in a 10 and 12 shot configuration. Hopefully we will see more about this critter at the Shot Show in January.
I just hope it comes with a threaded barrel option.