Okay, so what is the incompatibility?
Number of teeth?
Size or shape of teeth?
Up to now, I was under the misapprehension that plates/discs were standardized amongst bindings, including Burton's. But I guess I must be wrong on that.
I suspect an enterprising junior mechanical engineer could drill out the original plate from any old binding to fit the two ICS bolt/nut things, and the whole thing would work great anyway.
Does anyone know better on that score?
your question doesn't even make sense. LOOK at an est binding, it doesn't have a disc, the bolts attach on the outside. even with disc bindings there is no standard, they might be different diameteres, thicknesses, they might recess the holes for the heads of the screw differently, etc
est binders use DIFFERENT hardware as well
and lastly, there is no such thing as an ICS "adapter plate". they are just called DISCS. when you put a 4X4 disc into a burton binsing so you can use it on a 4X4 board you don't call it a 3D adapter plate, its just a disc
as for 2010, drake, flux, forum are making discs that work with ICS. Ride was going to but bailed, not sure about Union at this point. Rome isn't. Nitro isn't.