Silent Keyboards for Silent PCs?

Kethinov asks: "Following up on the question asked in this story, I have a similar problem as he did except my late night coding (typing) sessions, not my clicking, seem to generating excess noise for the people I'm living with. I, as he did, checked out this possible solution, but to be honest, I can't type on anything but a standard-layout keyboard. Now, I too can search Google, but just looking at a possible solution doesn't help much. Does anyone on Slashdot have experience in this matter, from which I could better narrow my choices?"