Hello, i didnt see this topic anywhere so i thought i would ask. Will
the 256 be as easily moddable like the 40H? like in terms of adding an
accelorometer or changing the light colors..

we discuss it toward the bottom here:

http://forum.monome.org/topic/925#new


led color change would be really difficult, they're all surface mount.

for customization i'd go with a kit, which we're getting ready to make 
more of.