[rumbler]

What I want is a keyboard with two big keys below the space bar, each half the width of the space bar, that I could map to Escape (the left one) and 3rdLevelShift (the right one). With Ctrl left of A, and Backspace just above Enter (aka the Unix Layout), I would be able to type without having to resort to ridiculous contorsions.

Loads of bonus points if the keyboard has the same kind of keyswitches as the IBM 5100 computer. If you are familiar with modern keyboard switches and folding knives, the IBM 5100 switches are to Cherry blues what a Chris Reeve Sebenza is to a Walmart-bought Buck knife.

[reeses]

Do you really need that large a spacebar anyway?

http://www.trulyergonomic.com

(I feel like a shill, but this is what I use when I'm not on the road, with the keys remapped like a crazy person.)