There are plenty of outfits out there looking to snap up your loose change in exchange for a pre-built rollup keyboard, but if you just can't stand that 'board that came bundled in with your last pre-fab PC, we think there's a better alternative. Apparently, all you have to do is remove the inner membrane from an unwanted set of keys, make sure the control board is accurately reassembled onto said membrane and cut out letters in the font of your choosing to keep you on track when your touch typing skills begin to fade.

That's it -- an über-painless, amazingly easy and absolutely inelegant method of crafting your own rollable keyboard.

Source- http://www.engadget.com/2008/01/26/diy-rollable-keyboard-exudes-simplicity/