For a self-built, completely programmable keyboard you may feast your eyes on the GH60: http://geekhack.org/index.php?topic=41464 http://geekhack.org/index.php?

For a self-built, completely programmable keyboard you may feast your eyes on the GH60: http://geekhack.org/index.php?topic=41464 http://geekhack.org/index.php?topic=41464. It's small, without function keys or numpad, and it comes with different layouts. You're expected to source your own switches and a case. Currently the group buy doesn't accept any new orders, but if you're interested some boards should be sold peer-to-peer.