Form Factor: 132 key standard layout plus extensions!
Switch Type: Buckling Spring w/ integrated diodes and PWM (pulse-width modulated) white-light LEDs (for back-lit keys)
Frame Color / Build / Material: IBM Pearl
Keycap plastic / color: PBT Pearl and Peable
Key rollover: NKRO w/ PS/2 interface 6KRO w/ USB
Other features (as many as you want):
USB disk mode where the keyboard appears as a USB disk with a simple xml file that can change the keyboard layout to scancode mapping. Delete the file to restore to factory defaults. Switch between configurations with a simple rename.
Steel back-plate. Titanium barrel assembly. Bolts connecting the two.
Adjustable weights can be added.
Each keycap is encoded (via I2C or the like) with the UTF-16 unicode character represented on the key. Remapping your keyboard (or added additional foreign language keys or symbols) becomes as simple as moving or adding a keycap.
I'm determined to build it... but I don't know how...