Does such an animal exist? I know that there are plenty of midi/piezo pickups. Wether you can set them to respon individually to midi channels is another question.

Controlling the transmission of Impact sound through floors

I've seen it done on youtube but did not know the model... but not midi channels.. im on about the guitars strings..

is that pickup for acoustic guitars =/ ??

They are bridge saddles for a strat type guitar. I'm pretty sure they have them for tunomatic style bridges as well. As far as Floyd Rose type pickups, I'm thinking tha you'll have to purchase a full on bridge for that.

There is a guitar system out there that does what you want, though I can't remember the name of it for the life of me.

Check this out:
http://www.rolandus.com/products/productdetails.aspx?ObjectId=849&skip=true&page=video&file=vg-99_demo_video_pt1.flv

Go to part three. I think this has the features you want.

In order to send certain strings to certain sounds, you need to be able to send to different midi channels. That is what I meant by channels.

Roland VG99 V-Guitar System nearly 1000$ ! lol

I dont know if the price is worth that...but it does look amazing...

The GK3 guitar midi pickup is probably only a few hundred bucks but you need to connect it to something. I'm not sure that it will attach to just any old midi synth module. There is another product out there but I just can't remember.

I will have a good look at it.