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This is the real, modular keyboard for programmers/hackers:

(It's a modular kit, the image above is just one of the configurations, the center part is an addon).

You can also have multiple layers, so you could create a dedicated programming layer. All firmware will be open source.

It's going to go up on kickstarter soon (when Canada launches in september).

Some more images (the thread is pretty lengthy):

Later on more modules will be sold, such as a trackball module that you could place in the center and so on.

There's also going to be a portable version: