I work on a docked laptop with 2 screens (3 in total, I keep the laptop open)
We all have USB keyboards for if we want to have the laptop closed, but lately I've been typing with both. My left hand on the USB keyboard and my right on the laptop.
My hands are a natural distance apart from one another and my shoulders are more relaxed. It means that there's uneven wear on both keyboards, but I'm quite a bit more comfortable.
I have wanted an Ergodox* keyboard for a while. They would certainly solve that problem. I think your situation with the different key styles would really bother me, however.
They are different, but similar enough not to be annoying. The feel is different, but the curve is the same and so is the actuating force, so all in all not too bad. Both Dell keyboards. You could just as easily do this with 2 USB keyboards, it's the poor man's solution :)
