Post Grandioso has a pedal emulation mapping that does indeed switch the samples in mid-note.
However, it\'s very crude, as one would expect. This is really much more in the realm of a physical modeling hybrid than a sampler, and we\'re going to be waiting a few more hardware and software generations to start seeing that kind of computational ability in a realtime softsynth.
I really like the Post library, but I wouldn\'t rate the pedaling emulation as one of the strong points. In a limited and controlled application, it can probably be made to sound very real, but overall, I have not had that experience with it.